Fatigue Isn't One Diagnosis

Fatigue Isn't One Diagnosis: The Seven Patterns Every NP Should Recognize

Fatigue is one of the most common complaints you'll encounter in clinical practice, and one of the easiest to overcomplicate. It's tempting to order pages of laboratory testing or chase every possible diagnosis, yet many clinicians still walk away feeling uncertain about where to begin.

In this episode of The Integrative Clinician by BridgeWell, I share a practical framework that has transformed the way I approach fatigue. Instead of asking, "What's causing the fatigue?" I encourage you to ask a better question: "What fatigue pattern am I seeing?"

You'll learn how to recognize seven common fatigue patterns and how each one points your clinical reasoning in a different direction. We'll explore the patient who lacks the raw materials to produce energy, the patient whose thyroid physiology deserves a closer look, the patient who isn't truly recovering from sleep, the afternoon energy crasher with early metabolic dysfunction, the patient whose immune system is consuming valuable energy, the patient whose digestive system is quietly driving fatigue, and the under-fueled, under-recovered patient who is doing everything "right" but still feels exhausted.

Throughout the episode, I'll walk you through the questions I ask during the visit, what I'm thinking as an integrative clinician, which laboratory tests actually help answer meaningful clinical questions, and what I begin doing before the patient ever leaves the office.

This isn't about memorizing another list of fatigue causes. It's about developing a framework for thinking clearly, recognizing patterns, and choosing the next right step with confidence.

In this episode you'll learn:

• Why fatigue is a symptom, not a diagnosis.

• The seven fatigue patterns every nurse practitioner should recognize.

• How to think through a fatigue workup before ordering advanced testing.

• Which laboratory tests provide meaningful clinical information and when they're appropriate.

• Practical first-visit interventions you can begin immediately while continuing your evaluation.

If you're ready to stop chasing fatigue and start recognizing patterns, this episode will give you a practical clinical framework you can begin using with your very next patient.

If you enjoy the episode, please follow the show, leave a review, and share it with another nurse practitioner who wants to practice differently.

About The Integrative Clinician by BridgeWell

The Integrative Clinician by BridgeWell is the podcast for nurse practitioners and NP students who want to practice differently.

Hosted by Dr. Sheri Erwin, DNP, MBA, APRN, FNP-C, each episode helps you develop the clinical reasoning, integrative medicine knowledge, and practical skills to care for patients with greater confidence. Whether you're exploring functional medicine, hormones, metabolic health, longevity medicine, or building your own integrative practice, you'll learn how experienced clinicians think and how to apply those principles in your own practice.

BridgeWell Integrative Education is more than education. It's the professional home for nurse practitioners who want to practice differently.

🌉 Learn more at www.bridgewelled.com

If you enjoyed this episode, please follow the podcast, leave a review, and share it with another nurse practitioner who wants to practice differently.

Transcript

Why Fatigue Feels So Hard

Speaker 0:07

Welcome back to Integrative Clinician. I'm Dr. Sheri Erwin, nurse practitioner, educator, and founder of Bridgewell Integrative Education. Last time we talked about something I think every integrative clinician needs before they ever start ordering advanced labs or building treatment plans. We talked about learning how to think. We talked about slowing down, recognizing patterns, choosing the right first step instead of trying to solve every problem during the first visit. Today, we're going to put that framework into practice. Because if there is one symptom that seems to overwhelm new integrative clinicians, it's fatigue. Fatigue is probably one of the most common reasons patients seek integrative care. Sometimes it's the only complaint, and sometimes it's one of 10 complaints. Either way, it's incredibly common. And honestly, it's incredibly easy to overcomplicate. I've watched clinicians order pages of laboratory testing, food sensitivity panels, hormone panels, stool testing, organic acids, micronutrients, heavy metals. And after all of that, they're still not sure why the patient is tired. Today I want to simplify that process because here's what I hope you'll take away from this episode. Fatigue is not one diagnosis, it's not even one problem. It's a symptom. It's a symptom that tells a story. Our job isn't to memorize every possible cause of fatigue. Our job is to recognize the story the patient is telling us. Once you recognize the story, the next steps become much clearer. So today I'm going to walk you through seven fatigue patterns that I see over and over in practice. For each one, we'll talk about it, what the patient sounds like, what questions I'm asking, what's going through my mind as a clinician, what labs actually matter, and most importantly, what I do before the patient even leaves the office. Because patients deserve more than a long list of possibilities. They deserve a clinician who knows where to begin. Before we dive in, I want to ask you something. Think about the last patient you saw whose chief complaint was fatigue. When they said I'm exhausted, what picture immediately formed in your mind? Did you think thyroid, iron, hormones, stress, sleep? If so, you're completely normal. Our brains naturally jump towards explanations. Mine still does, but over years I've learned something. Better question isn't what's causing the fatigue. The better question is what kind of fatigue am I looking at? Because not all fatigue feels the same. Some patients are sleepy, some are physically drained, some are mentally exhausted, some crash after meals, some wake up tired, some have enough energy to exercise, but can't think clearly. Those are completely different clinical stories. And when we treat them like they're all the same, patients don't improve the way we hoped they would. I want to tell you about someone I will never forget. A woman came to me. She was in her early 40s, still working full time, raising kids, trying to exercise, trying to eat well, trying to hold everything together. She sat down, looked at me, and said something I hear almost every week. I'm just tired. I smiled and I asked, tell me more. She laughed. I don't know how. Think about that for a second. As a clinician, we asked patients to describe fatigue all the time. But fatigue is actually difficult to describe. So I asked her something different. What does tired actually look like in your life? She thought for a minute, then said, I can get through work. I can make dinner. I can help my kids with homework. But after that, I am done. I feel like someone unplugged me. That answer immediately changed my thinking. She wasn't sleepy. She wasn't falling asleep at her desk. She wasn't saying she lacked motivation. She was describing depleted energy. That distinction matters because those patients don't all need the same workup, and they definitely don't all need the same treatment. That conversation changed the way I interviewed every fatigue patient. Instead of asking, tell me about your fatigue, I asked, what does fatigue actually feel like to you? That question alone often tells me more than several lab tests. Let me let you inside my brain for a moment. Whenever someone tells me they're tired, I don't immediately start thinking ferritin or thyroid or hormones. Instead, I'm trying to answer one question. Which fatigue story am I listening to? Because once I understand the story, the physiology becomes much easier to organize. Think about emergency medicine for a moment. Chest pain isn't one diagnosis. Chest pain is a symptom. And experienced clinicians immediately start asking what kind of chest pain, pressure, sharp, exertional, pleuritic, radiating, associated with nausea. We're doing exactly the same thing here. We're simply applying the same clinical reasoning to fatigue. I'm going to walk you through seven fatigue stories I see most often. The seven that I think every nurse practitioner should recognize. And as we move through each one, I want you to picture your own patients because I promise you've already seen every one of these people. Maybe you just didn't have a framework for organizing their story.

Underrepletion And Missing Raw Materials

Speaker 6:21

Let's start with what I believe is one of the most commonly overlooked patterns in women's health. The patient who simply doesn't have enough raw materials to produce energy. Let's talk about under-repletion. I think one of the biggest mistakes we make with fatigue is assuming every tired patient has a problem producing energy. Sometimes the body simply doesn't have raw materials it needs. Think about trying to build a house. You can have the best contractor in the world, the best blueprint, the best tools, but if no one delivers a lumber, the house doesn't get built. Our bodies aren't that different. We can have perfectly functioning mitochondria, healthy hormones, normal sleep, but if we're missing the building blocks needed to transport oxygen and support normal cellular function, patients feel exhausted. That's why the very first fatigue story I want you to recognize is what I call underrepletion. Now, for many patients, the story begins with iron, but it doesn't end here. It can also involve vitamin B12, vitamin D, protein intake, sometimes several nutrient deficiencies at once. The common thread is this the body doesn't have enough of what it needs to perform normal physiology. Let's meet Sarah. Let's imagine Sarah walks into your office tomorrow morning. She's 38 years old, she's a nurse, she works 12-hour shifts, she has two young children, and she tells you, I don't understand what's happening. I used to have so much energy. Now I'm exhausted all the time. She also casually mentions, my hair seems thinner, my workouts feel harder, I get winded walking upstairs, and oh, and I've always had really heavy menstrual cycles. At that point, I haven't ordered a single lab, but my brain is already organizing her story. Not deciding, not diagnosing, organizing, because there are several clues beginning to point in the same direction. Here's exactly what's going through my mind. I'm asking myself, is this a patient who can't make energy? Or is this a patient who doesn't have enough raw material to support normal energy production? Those are two very different questions. Heavy menstrual bleeding, hair shedding, exercise intolerance, feeling cold, restless legs, shortness of breath climbing stairs. Every one of those clues nudges iron higher on my differential. Not because I'm trying to prove it's iron, but because the story fits. That's an important distinction. Clinical reasoning isn't about proving yourself right, it's about following the evidence the patient is giving you. If there's one lesson I'd love you to remember from this section, it's this. Never stop at I'm tired. Instead, ask what else changed? Because patients rarely volunteer the information we need, not because they're hiding it, because they don't realize it's connected. Hair loss, cold intolerance, heavy periods, restless legs, craving ice, feeling dizzy when standing. Many patients never think to mention those things unless we ask. And those answers completely change the direction of the visit. My first question. So here's where I usually begin. Tell me about your menstrual cycles. Have they always been heavy? Did they become heavier after you having children? Have you noticed more clotting? How long do they last? If they've reached menopause, were they were they heavy before menopause? Then I'll ask, have you donated blood recently? Any gastrointestinal symptoms? Any history of bariatric surgery? Any restrictive diets? Vegetarian, vegan, very little red meat? How much protein do you typically eat? Any restless legs at night? How's your exercise tolerance compared to a year ago? Notice something. These aren't random questions. Every single question is testing a hypothesis. That's what experienced clinicians do. They don't ask more questions, they ask better questions. If you were sitting beside me in clinic, I'd probably stop and ask, what story is the patient telling you? Not what lab do you want to order? Can you defend why you're thinking iron? Can you explain which symptoms point in that direction? Because if you can, you're practicing clinical reasoning, not cookbook medicine. Once I've gathered the history, then I start thinking about testing. For this patient, I'm interested in answering several questions. Is this anemia? What are her iron stores? Is her iron transport adequate? Are vitamin B12 and vitamin D contributing? So my initial work often includes a CBC, a ferritin, an iron panel, a vitamin B twelve when clinically appropriate, vitamin D if it fits the story. Not because every fatigue patient needs every one of those labs, but because they answer specific clinical questions. Remember what we talked about in episode one. Every test should earn its place. The one thing I never want patients to experience is feeling like nothing happens until lab results come back. Even while we're waiting for answers, there's always something meaningful we can do. We can begin talking about protein intake. We can review iron-rich fruits. We can discuss mental history. We can discuss menstrual history. We can identify possible bleeding sources. We can begin addressing constipation if we anticipate iron replacement may become part of the plan. And maybe most importantly, we validate what we're experiencing. We validate what they're experiencing. Sometimes patients have spent years hearing everything looks normal. Simply having someone say, I believe your fatigue deserves a thoughtful evaluation can be incredibly healing. Here's today's pearl. A normal hemoglobin does not automatically mean iron status is optimal. Don't stop thinking just because the CBC looks reassuring. Look at the entire clinical picture. Always interpret laboratory values within the patient's story, not the other way around. Not every patient who feels cold, gains weight, struggles with constipation, and feels exhausted has an iron problem. Sometimes the body has plenty of raw materials. The issue is that one of its most important metabolic control systems isn't functioning the way we'd expect.

Thyroid Signaling Without Tunnel Vision

Speaker 14:15

Let's talk about the second fatigue story, the thyroid signaling pattern. Let's move into what this story tells us. This is the patient who almost always tells me, I feel like my body has slowed down. Now that's an interesting phrase because patients don't usually walk into your office saying, I think my free T3 is low, or I'm worried about my thyroid autoimmunity. They tell stories. And one of those stories I hear over and over is this. I don't feel like myself anymore. They'll say, I'm tired all the time. I've gained weight even though I haven't changed anything. My hair is dry. My skin is dry. I'm constipated. I'm freezing when everyone else is quite comfortable. I just don't feel like my body is working the way it used to. When I hear those symptoms clustering together, my attention naturally starts shifting toward a thyroid physiology. Notice what I said thyroid physiology, not thyroid disease, because those aren't always the same conversation. I want you to meet Jennifer. She's a 46-year-old female. She comes into our office because she's exhausted. But as the conversation continues, she says something that catches my attention. I honestly think I'm just getting lazy. That statement breaks my heart every time I hear it, because many women begin blaming themselves long before they ever seek help. She goes on to tell me she's exercising three to four days each week. She's tracking her food. She's sleeping seven to eight hours most nights. And despite doing everything she knows to do, she's slowly gaining weight. She's constipated and she's cold. Her hairbrush seems fuller every month, and she says, My primary care provider checked my thyroid last year and said it was normal. This is where many new clinicians become uncertain. Do we move on? Do we assume thyroid isn't involved? Or do we look a little deeper? Here's exactly what's happening inside my head. I'm not asking, does she have hypothyroidism? I'm asking could thyroid physiology be contributing to the story she's telling me? That's a much broader question because thyroid hormone doesn't exist in isolation. It interacts with nutrients, iron status, stress physiology, inflammation, autoimmunity, sleep, and overall metabolic health. So before I decide what test she needs, I want to understand her story better. This is where I really this is where a really thoughtful history often gives me more information than another lab panel. I'll ask, when did you first notice these changes? Was it gradual or sudden? Did it begin after pregnancy? After a major illness, during perimenopause? Then I'll ask, does anyone in your family have thyroid disease? That question matters. Autoimmune thyroid disease frequently runs in families. Then I ask, do you have other autoimmune conditions? Because autoimmune disease often travel together. I'll ask about constipation, cold intolerance, dry skin, hair texture, changes in menstrual cycle, voice changes, neck fullness, difficulty swallowing, and one question that surprises many patients, are you taking biotin? Because high dose biotin supplements can interfere with thyroid laboratory testing. Sometimes the simplest question prevent the biggest misunderstanding. If you were in my clinic, I'd probably ask you something like this. If Jenner's first TSH was normal last year, why are you still thinking about thyroid? I'm not asking because there's one correct answer. I'm asking because I want to hear your reasoning. Maybe you'll tell me because the symptoms fit. Good. Maybe you'll say because she's perimetapausal. Also reasonable. Maybe you'll tell me I want to make sure we're not missing autoimmune thyroid disease. Excellent. Clinical reasoning isn't memorizing lab values, it's connecting physiology to a patient's story. What labs actually matter? Now let's talk about testing. For many patients, I still begin with the basics, a TSH and a free T4. Those are appropriate starting points, but there are times when patient's history tells me I need additional information. If she's continuing to have symptoms despite apparently normal thyroid screening, or she's already taking thyroid medication, or there's a strong family history of autoimmune disease, I may add a free T3. If autoimmune thyroid is part of my differential, I'll consider thyroid pyroctasis antibodies and thyroid globulin antibodies again. Notice what's driving the decision, not curiosity, the patient's story. Every additional test should answer a specific clinical question. Sometimes I wish someone had taught me. Earlier in my career, I thought thyroid evaluation was mostly about interpreting numbers. Now I realize it's really about understanding physiology because sometimes the laboratory results explain the patient's symptoms beautifully, and sometimes the laboratory results push me to look elsewhere. Both outcomes are valuable. Good testing doesn't always confirm your hypothesis. Sometimes it helps you confidently move on to the next possibility. That's good medicine. Here's today's clinical pearl. Never let one laboratory value replace clinical thinking. Laboratory testing should always be interpreted within the context of the patient's history, physical exam, and overall clinical presentation. Patients are more than a TSH. Their entire physiological systems. Before we leave this patient, while we're waiting for the laboratory results, I'm not sitting on my hands. We're already talking about protein intake, constipation, sleep quality, movement, and stress recovery. Those foundational interventions support nearly every aspect of health, regardless of what the thyroid testing ultimately shows. Patients appreciate having something meaningful to work on instead of feeling like they're simply waiting for answers.

When The Body Cannot Recover

Speaker 21:37

Now let's shift gears. Our next patient looks completely different. She doesn't tell me she's cold, she isn't particularly constipated. In fact, she often says something like this I'm exhausted all day, but the second my head hits the pillow, my brain turns on. Or I wake up every morning feeling like I'm I never actually slept. That's an entirely different fatigue story. And it's one that I think is becoming more common every single year. Let's talk about the patient whose body has forgotten how to recover. The third fatigue story is probably the most frustrating for patients because they'll often tell me I'm exhausted all day. I can barely keep my eyes open after lunch. I feel like I'm running on fumes. But then night comes, they're finally in bed, the house is quiet, the lights are off, and suddenly their brain wakes up. They'll tell me I'm exhausted, but I can't shut my mind off. Or I wake up every single night around two or three in the morning. Or I sleep eight hours, but I wake up feeling like I never slept at all. Have you ever had that patient say, I don't know how I can be so tired and still not be able to sleep? That is the patient I want you to picture right now. Because this fatigue story isn't really about sleep, it's about recovery, and that's a completely different conversation. I want you to meet Michelle. Michelle is a 44-year-old female. She has a demanding career, teenage children, she's taking care of aging parents, she exercises almost every day because she knows it's important. She drinks coffee just to get moving in the morning. By two o'clock in the afternoon, she's desperate for something sweet. Maybe another coffee, maybe chocolate, maybe both. She pushes through the rest of the day, gets dinner on the table, cleans the kitchen, finally sits down, and the second she has a chance to relax, her mind starts racing. She's thinking about tomorrow, the kids, work, laundry, bills, the email she've got to answer. By the time she finally falls asleep, she wakes up again at three in the morning, and when the alarm goes off, she feels like she barely slept. Sound familiar? I think almost every NP listening here has met Michelle. Maybe several times this week. Here's what goes through my mind. I don't immediately think cortisol, I don't immediately think I need hormone testing. Instead, I ask myself, is this patient actually failing to produce energy or is she failing to recover? Those are two very different physiological problems. Think about an elite athlete. If you ask them what makes them stronger, most people would say training. But that's only half the story. The body adapts during recovery, not during the workout. Patients are actively patients are exactly the same. If the nervous system never truly shifts into recovery mode, the body never has an opportunity to restore itself. Eventually everything begins to feel harder. This is where history becomes incredibly important. I'll ask, walk me through your day, not your ideal day. Yesterday. Tell me when you woke up. How many times did you hit snooze? When was your first cup of coffee? How many cups do you drink? What time is your last cup? When do you finally stop working? What time do you get into bed? What time do you actually fall asleep? Do you wake during the night? If so, what wakes you? Is it your bladder, your thoughts, feeling hot, feeling anxious? Then I asked something that surprises many patients. What does your morning look like? Because we because how we begin the day often influences how we finish it. Do they sleep outside? Do they step outside? See sunlight, immediately check email, scroll social media, rush out the door. Small habits matter. Here's something I tell my students all the time. Just because someone spends eight hours in bed doesn't mean they experienced eight hours of restorative sleep. Quality and quantity are not the same thing. And neither one tells us whether the nervous system is actively recovering. If you were in my clinic, I'd ask you this question, why are you assuming this is a hormone problem? Sometimes newer clinicians hear, 44 year old, poor sleep, fatigue, brain fog, and immediately jump to estrogen. Could hormones be contributing? Absolutely. But there's but here's my concern. If we don't understand sleep first, we're going to have a very difficult time understanding everything else. Sleep influences mood, blood sugar, inflammation, pain precep, pain reception, recovery, hormone signaling, immune function. The list goes on and on. Sometimes improving sleep changes half the patient's symptoms. Not because sleep is magic, because recovery is foundational physiology. Because recovery is foundational physiology. What about testing? Now let's talk about labs, and here's where I think it's important to be disciplined. Sleep is primarily sleep is preliminary sleep is preliminary diagnosed through a thoughtful history, not a blood draw. If someone snores, wakes with headaches, has witnessed apnea, sleeps while driving, feels sleepy while driving, I'm thinking about obstructive sleep apnea. That's an entirely different conversation. If the history strongly suggests dysregulated stress physiology, and I believe understanding the daily cortisol pattern will change management, then this may be an appropriate time to consider cortisol pattern testing. Notice what I didn't say. I didn't say everyone with fatigue needs cortisol testing. They don't. Testing should answer a question. In this patient, the question might be is her daily stress response pattern supporting recovery or interfering with it? That's a very different question than simply asking, what's her cortisol? One of the things I love about this fatigue story is that we almost always have something meaningful we can start with today. We don't have to wait for testing. We can begin building recovery. Maybe that starts with a consistent wake time. Morning light exposure, reducing late caffeine consumption, a screen curfew before bed, looking honestly at training volume, supporting relaxation before sleep. Sometimes I'll tell patients I don't want you to focus on sleeping better this week. They look confused. Instead, I want you to focus on recovering better because recovery begins long before bedtime. And I think that small shift in language helps patients understand that sleep isn't just something that happens. It is something we prepare our bodies for. Here's today's clinical pearl. A tired body and a recovery body are not the same thing. Many patients are exhausted because they've been borrowing energy for months or years without giving their physiology any opportunity to repay the debt.

Afternoon Crashes And Blood Sugar Swings

Speaker 30:10

Helping them recover often changes far more than their energy. Now let's move into fatigue story that I think surprises many clinicians because these patients often tell us my bot, my blood sugar has always been normal. And technically they may be right. Their hemoglobin A1C looks fine. Their fasting glucose looks reassuring. Yet every afternoon their energy completely disappears. Let's talk about the patient whose fatigue is a real story about metabolic flexibility and the blood sugar regulation. This patient tells a completely different story. She says I wake up feeling okay. I actually have a decent amount of energy in the mornings. But every afternoon, somewhere around two or four o'clock, it's like somebody flips a switch. I can't think, I want something sweet. If I don't eat, I get irritable. And once I get home from work, I can fall asleep on the couch. Does that sound familiar? I think we've all met this patient. Sometimes we've been this patient. Now here's what's interesting. When I ask if she's ever been told she has diabetes, she says no. Actually, my blood sugar has always been normal. And very often she is right. Her fasting glucose maybe be completely normal. Her hemoglobin A1C may still fall within normal range. So it's tempting to tell ourselves it can't be blood sugar, but physiology is rarely that simple. I want you to meet Amanda. She's 49, she's a school administrator, she starts work early, she skips breakfast because she's not hungry, and around 10 o'clock, she grabs a coffee and a muffin. Lunch is usually whatever she can eat between meetings. By three o'clock, she's digging through her desk looking for candy. By the time she gets home, she's starving. Dinner becomes her biggest meal of the day. After dinner, she has just enough energy to clean the kitchen before collapsing on the couch. When I ask what bothers her the most, she says, I feel like my body has become completely unpredictable. Now that's an important clue because she's not describing constant fatigue. She's describing energy instability. Here's what immediately goes through my mind. I'm asking myself, is this patient struggling to reduce energy or is she struggling to maintain energy? Those are two different physiological questions. When energy rises and falls dramatically throughout the day, I start thinking about metabolic regulation, blood sugar variability, meal composition, meal timing, protein intake, insulin physiology, not because I know that's the answer, but because the story is pointing me in that direction. This is one of those fatigue stories where the history is incredibly revealing. I'll ask, walk me through yesterday. Not your best day, but yesterday. What time did you eat breakfast? How much protein was in that meal? Do you usually skip breakfast? When do you feel your first energy crash? What happens if you don't eat? Do you ever feel shaky, irritable, lightheaded? Do you crave sweets? How often do you snack? How much soda do you drink? Sweet tea, energy drinks, or a specialty coffee drink you like to have on a daily basis? Then I'll ask about movement. Do you walk after meals? Or do you do any resistance training? How active are you during the workday? And again, these questions aren't random. They're helping me understand how this patient's physiology is responding throughout the day. Early in my career, I thought blood sugar problems meant diabetes. Now I realize there's a long stretch of physiology that happens before diabetes ever develops. Patients often begin experiencing unstable energy, cravings, weight gain, difficulty losing weight long before their hemoglobin A1C ever crosses into the diagnostic category. That's why listening carefully to your patient's story matters so much. Their symptoms often change before their diagnosis does. If you were in my clinic, I'd probably ask, what evidence do you have that blood sugar regulation is contributing? Notice I didn't ask, do you think it's insulin resistance? Tell me why. Maybe it's the afternoon crashes, maybe it's the intense cravings, maybe it's the central weight gain. Maybe it's feeling dramatically better after eating. That's clinical reasoning. You're connecting symptoms to physiology, not jumping to conclusions. What about testing? For many patients, I'll begin with the basics. A comprehensive metabolic panel gives me a valuable context. I'll review fasting glucose, I'll look at the hemoglobin A1C. Those are appropriate starting places. If the patient story strongly suggests early insulin resistance, especially if there's an unexplained weight resistance, central fat distribution, a family history of diabetes, or persistent metabolic symptoms despite normal screening labs, this may be an appropriate time to consider fasting insulin along with fasting glucose to calculate the HOMO IR. Notice I'm not ordering it because every patient needs it. I'm ordering because I have a clinical question. Could early insulin resistance be contributing to this patient's fatigue and metabolic symptoms? That's a very different question from ordering routine labs. Before the patient leaves, here's one thing I love about this fatigue story. Patients often notice meaningful improvement with relatively simple changes. We'll talk about building a breakfast that includes adequate protein, adding fiber, avoiding meals built almost entirely around refined carbohydrates, creating more consistency with meal timing, encourage walking after meals whenever possible, beginning resistance training if appropriate. Notice I'm not putting someone on extreme diets. I'm helping create more stable physiological environment because stable energy often begins with stable physiology. Here's today's clinical pearl. Patients don't usually describe insulin resistance. They describe cravings, energy crashes, difficulty losing weight, feeling hungry all the time. Listen to your patient's language, then translate it into physiology. That's one of the skills that makes experienced clinicians so effective. One of the things I hear patients say all the time is I just don't have any willpower. And honestly, I don't love that word because it assumes the problem is a character problem. When many times the problem is physiology, if someone is under eating protein, experiencing significant blood sugar variability, sleeping poorly, and trying to function on caffeine, that's not simply a willpower issue. Their body is responding adequately the way we'd expect. Helping patients understand that often removes an incredible amount of shame. I think that's one of the greatest gifts we can offer. Not just education, but understanding.

Inflammation As An Energy Drain

Speaker 38:25

Now let's move into another fatigue story. This patient doesn't necessarily crash after meals. She doesn't describe being wired at night. Instead, she says things like this everything hurts. I feel puffy, my joints ache. I feel like I have the flu all the time. This is the patient whose body is spending enormous amount of energy dealing with inflammation, and that changes the entire clinical conversation. This patient usually doesn't begin the visit by saying, I'm tired. Instead, she often says, I just don't feel well. That's an important distinction when you ask her to explain. She says things like everything's achy, I wake up stiff, I feel swollen, my joints hurt, I feel like I'm getting sick all the time. Some days I feel like I have the flu, but I don't. She may also describe headaches, brain fog, skin changes, digestive symptoms, or simply feeling like her body has never been the same since a viral illness. That's a very different fatigue story than the patient with crashes in the afternoon after lunch. It's a different story than the patient with heavy menstrual cycle bleeding, and it's certainly different than the patient who can't sleep. This patient often feels like her body is constantly working. And in many ways, that's exactly what's happening. I want you to meet Laura. She's a 42-year-old female. She tells me I don't even know how to explain it. I'm not sleepy, I'm just worn out. She says she wakes up feeling sore, her rings feel tight in the morning, her knees hurt walking downstairs, and by the afternoon she feels like she's dragging herself through the day. Then she says something that immediately gets my attention. I've never really felt the same since I had COVID a couple of years ago. Or maybe she says everything seemed to change after mono. Or I've had rheumatoid arthritis for years, but lately my energy has completely disappeared. Those are important clues because they're telling us this fatigue may be part of a larger inflammatory or immune story. Here's what happens in my head. I'm asking myself, is this patient's body spending an enormous amount of energy responding to inflammation? Because inflammation is expensive. When the immune system is activated, whether it's because of autoimmune condition, a chronic inflammatory process, recovery after a significant infection, or another medical condition, the body diverts tremendous resources towards protection and repair. Patients experience that as fatigue, not because they're lazy, not because they're unmotivated, but because physiology has priorities, and when the immune system is busy, energy availability for everything else often decreases. This is where I slow down. I want to understand the timeline. When did this begin? Was there an illness before your symptoms started? Have you had COVID? Have you had mono? Any recent infections? Then I start exploring symptoms that might point towards immune activation. Do your joints swell? Do they hurt more in the morning? Unexplained rashes, dry eyes, dry mouth, mouth ulcers, new food intolerances, persistent headaches, family history of autoimmune disease. I ask these questions. I also ask about sleep, stress, movement. Because even when inflammation is present, those factors can significantly amplify how patients feel. Early in my career, if someone had told me they had inflammation, I'd immediately start thinking about supplements, anti inflammatory diet, omega-3, and while those absolutely have a place, I learned something much more important. Before I ask how to reduce inflammation, I ask why is the body inflamed? That's a much better clinical question. Inflammation isn't a diagnosis, it's a response. And our responsibility is to understand what the body is responding to. If you were sitting beside me in clinic, I'd ask you, what evidence do you have that inflammation is actually contributing? Because inflammation has become one of those words that's used almost everywhere. Patients hear it on social media, advertisements talk about it, supplement companies talk about it. But as a clinician, we need to be more precise. What symptoms support your thinking? What objective findings support your thinking? Could there be another explanation? That's how we keep ourselves grounded. For many patients, I'll begin with some foundational information. A CBC may provide important clues. Depending on the clinical picture, I'll often consider CRP or high sensitivity. CRP as an initial marker of systemic inflammation. But here's something I want to emphasize. Those tests don't tell us why inflammation is present. They simply tell us whether they may be evidence of an inflammatory process. From there, the history, the physical exam, and the rest of the patient's story guide what comes next. If someone has symptoms concerning for autoimmune disease, that may lead us down a different pathway than someone recovering from a viral infection. This is where a thoughtful medicine matters far more than shotgun testing. One of the questions patients often ask is, so what can I start doing today? And I love to answer that question because there are almost always things we can immediately do. We talk about sleep, protein, fiber, gentle movement if appropriate, reducing ultrapasteurized, reducing ultra processed foods, managing stress, supporting recovery. Notice something. Those recommendations aren't glamorous. They're not trendy, but they create the physiological environment where healing is more likely to occur. Then as we gather more information, we can build a more targeted treatment plan. Here's today's clinical pearl. Don't chase inflammation, investigate it. Inflammation is a clue, not the final diagnosis. The more curious you become about why the body is inflamed, the better clinician you'll become. One thing patients have taught me over the years is that being is that being believed matters. Many people with chronic inflammatory conditions have spent years hearing your labs are okay, you're just getting older, maybe it's stress. When we slow down, listen carefully, and thoughtfully investigate their symptoms, we're doing more than practicing good medicine. We're helping people restore truth. And I think that's one of the most meaningful parts of what

Gut-Driven Fatigue And Constipation Clues

Speaker 46:15

we do. Now let's move into one of my favorite fatigue stories because these patients often walk in convinced they have a hormone problem or an autoimmune or an autoimmune disease or a food sensitivity. Instead, the biggest clue is hiding in their digestive system. Let's talk about the patient whose gut may be driving far more than bloating. Let's talk about the gut-driven fatigue. Because these patients don't usually schedule appointments because they're bloated. They schedule an appointment because they're exhausted. The bloating, the constipation, the reflux, and the food sensitivities, those often come up almost accidentally. You'll ask, anything else going on? And they'll shrug and say, Well, I've always been constipated, or I've always had a sensitive stomach, or I just figured everybody felt bloated after they ate. Whenever I hear that, I pay attention because sometimes the digestive system has been telling the story long before the fatigue became and impossible to ignore. Emily is 43. She comes in because she's tired, she's frustrated, and she tells me, I feel like I'm reacting to everything I eat. She says I'm exhausted after meals, my stomach always feels swollen by the evening, and I'm lucky if I have three bowel movements a week. Then she laughs and says, but that's normal for me. I smile, that becomes normal for you, but it's not normal physiology. Sometimes patients have lived with symptoms for so many years, they stop recognizing them as symptoms. Here's what's happening in my head. I'm asking myself, could this digestive system be contributing to the fatigue? Not causing every symptom, contributing because digestion isn't separate from the rest of the body. If nutrients are being absorbed, if nutrients aren't being absorbed well, if bowel function is chronically slow, if every meal leaves someone feeling miserable, that affects energy, that affects mood, that affects inflammation, that affects quality of life. Before I start thinking about complicated protocols, I want to understand how this digestive system is functioning every single day. This is where I slow the conversation down. Walk me through your digestion. How often do you have a bowel movement? Every day, every other day, once a week? When do you do you feel completely empty? Or do you feel constipated, even after a bowel movement? When does the bloating happen? Immediately after eating? An hour later? By the end of the day? Do you wake up bloated? Or does it develop throughout the day? Any heartburn, reflux, excessive belching, gas? What do your stools actually look like? Have you taken antibiotics frequently? Have you had abdominal surgery? Had your gallbladder removed? Those answers tell me far more than simply asking. Do you have a digestive problem? One of the biggest mistakes I made early in functional medicine was assuming every patient with bloating needed stool testing. Do stool tests have a place? Absolutely. But here's what I eventually realized. If someone hasn't had normal bowel movements in four or five days, why am I trying to interpret a complicated stool analysis before I've addressed basic motility? Sometimes we're asking an advanced test to answer questions that physiology has already answered. That changed the way I practice. If you were with me in clinic, I'd ask you this. Why are you ordering a stool test today? Tell me what the clinical question we're trying to answer. Would improving bowel motility change the symptoms before we spend hundreds of dollars on specialty testing? Sometimes the answer is yes and sometimes the answer is no. But I want you to think about sequencing. Experienced clinicians think about sequencing, not just possibilities. Now let's talk about testing. There are absolutely patients where advanced stool testing is needed, breath testing, or additional gastrointestinal evaluation. Makes excellent clinical sense. But here's my general approach. First, understand the history. Second, address obvious physiological barriers like constipation, hydration, dietary patterns, and meal timing. Then, if symptoms persist or the history strongly suggests another underlying process, that's when additional testing often becomes much more informative. Notice I'm not against testing. I'm against testing too early. The quality of the information we receive often depends on whether we first address the basics. One of the things I love about this fatigue story is that this patient often leaves feeling hopeful because they realize maybe this isn't random, maybe their fatigue, their bloating, their constipation are all connected. We'll begin talking about hydration, fiber, protein, meal timing, chewing thoroughly, physical activity, supporting bowel regularity. Those are not glamorous interventions again, but they're foundational. And sometimes foundational physiology creates extraordinary clinical improvements. Here's today's clinical pearl. Don't mistake chronic symptoms for normal physiology. Patients often normalize symptoms they've lived with for years. One valve movement every four or five days isn't just how their body works. Daily bloating after every meal isn't something we should simply accept. When patients normalize dysfunction, part of our role is helping them recognize what healthy physiology actually looks like. One of my favorite moments in practice is when a patient comes back a few weeks later and says, I didn't realize how bad I felt until I started feeling better. Have you ever heard that before? I hear it all the time. Sometimes improving digestion doesn't just improve digestion, it changes energy, mood, comfort, confidence, and patients begin reconnecting with their bodies in a completely different way. That's one of the reasons I love this work.

Underfueled And Overtrained Exhaustion

Speaker 53:17

We've covered six very different fatigue stories, but there's one more patient I want you to meet. And honestly, this patient often surprises both clinicians and patients because they're convinced they're doing everything right. They're exercising, they're eating healthy, they're working out hard, and yet their body simply doesn't have enough resources to keep up with the demand being placed on it. Let's finish with what I think is one of the most overlooked fatigue stories of all: the underfueled, under-recovered patient. I want to finish with this one because honestly, it's one that I don't think we talk nearly enough about. This is the patient who walks into your office saying, I'm doing everything right. They're exercising, tracking their calories, trying to lose weight, drinking plenty of water, they're motivated, they're disciplined, and yet they're exhausted. Sometimes they're frustrated because they're actually doing more than ever and feeling worse than ever. This is Rachel. She's 47, she's determined to get healthy. She walks 10,000 steps every day. She does orange theory four mornings a week. She cuts out sugar. She's eating around a thousand calories most days because she's trying to lose weight. She's terrified of carbohydrates. Breakfast is coffee, lunch is a salad, dinner is whatever fits into her caloric tracking app. And when I ask how much protein she eats, she shrugs, I don't know. When I ask how she sleeps, about five and a half hours nightly. When I ask how she's recovering from her workout, she laughs. I just figured I was out of shape. Before we talk about hormones, before we talk about supplements, before we talk about testing, I stop and ask myself something. Is Rachel's body actually failing? Or is Rachel asking her physiology to perform under impossible conditions? That's a very different question, because our bodies are remarkably adaptable, but there's limits. You can't constantly under eat, undersleep, overtrain, live under chronic stress, and expect your physiology to perform optimally. Eventually the body begins conserving energy, not because it's broken, because it's trying to protect you. This is where I become incredibly curious. Walk me through yesterday. What did you eat? Not what you usually eat. What did you eat yesterday? How much protein was at breakfast? How many meals? How many snacks? What do your workouts actually look like? How many days each week? Any resistance training? Or mostly cardio? How many hours of sleep are you averaging? What was your last completely restful day? What medications are you taking? Any recent dosage changes? GLP1 medications, stimulants, antihistamines, beta blockers, SFSRIs. Because medication can absolutely influence energy. Sometimes the story isn't one thing. It's several small things adding up over time. One of my favorite conversations sounds like this. I don't think your body is fighting you. I think your body is protecting you. There's usually a long pause. Then the patient says, I've never thought about it that way. And honestly, that's one of my favorite moments in practice. Because the conversation shifts from blame to biology. Patients stop asking, what's wrong with me? And they start asking, What does my body need? That's a much healthier place to begin. What about testing? For many of these patients, testing isn't my first step. History is. Because no laboratory value can tell me someone is eating 40 grams of protein a day, or sleeping five hours, or doing high-intensity exercise six days a week without adequate recovery. Those answers come from listening. If additional testing becomes appropriate, we'll order it. But first, I want to understand the lifestyle that's shaping this physiology. This patient almost always leaves with hope, not because I've promised a miracle, but because we've identified things they can actually change. We increase protein, we prioritize resistant training over endless cardio, we build recovery into the week, we improve sleep, we normalize eating enough to support healthy physiology, and perhaps most importantly, we remove shame because exhaustion isn't always a sign of failure. Sometimes it's simply a sign that the body needs more support than it's receiving. Here's today's final clinical pearl. Never confuse discipline with recovery. Many of your most exhausted patients aren't doing too little. They're doing too much. For too long with too little recovery.

Mixed Patterns And Picking First Steps

Speaker 58:46

Before we wrap up, let's do something a little different. I want to see if you can identify the fatigue story. Imagine this patient is sitting in your office. She's 45, her chief complaint is fatigue. She tells you, I wake up exhausted, I hit a wall around 3, I crave sugar every afternoon, I've gained 15 pounds over the last year, and hemoglobin A1C is normal. She also says I snore according to my husband. I only sleep around six hours, and honestly, I haven't had normal valve movement in three days. Pause for a second. What fatigue story are you hearing? Notice something. There isn't just one. There are several sleep recovery, metabolic health, gut physiology, and maybe more. So here's the question. Which one deserves your attention first? That's the difference between memorizing fatigue patterns and practicing clinical reasoning. Sometimes patients don't fit neatly into one category. That's okay. Real patients are wonderfully complex. Your job isn't to solve every problem during the first visit. Your job is to identify the next most important step. That's exactly what we talked about in our first episode. Clinical confidence doesn't come from knowing everything, it comes from knowing where to begin. So here's what I love for you to do this week. For every patient who comes in complaining of fatigue, don't ask yourself what's causing this. Instead ask, which fatigue story am I? Write it down. Then ask yourself three questions. What evidence supports this? What evidence argues against it? What information am I still missing? I promise, as you start thinking this way, you'll find yourself ordering fewer unnecessary tests, having more focused visits, and feeling more confident, not because you've memorized more facts, but because you've strengthened your clinical reasoning. If there's one thing I hope you remember from today's episode, it's this fatigue isn't one diagnosis. It's one of the body's most common ways of telling us that physiology is struggling. Our responsibility as clinicians isn't to memorize every possible cause. It's to become excellent listeners. Because patients don't walk into our office saying my ferritin is low, or my sleep architecture is disrupted, or my insulin sensitivity is declining. They tell stories, stories about their energy, their morning, their afternoon, their sleep, their digestion, their workouts, their lives, and hidden inside those stories are the clues we need. When we learn to listen differently, we begin practicing differently. And that's what this podcast is all about, not giving you another checklist, helping you become the kind of clinician who thinks clearly, listens deeply, and knows where to begin.

Weekly Challenge And Closing

Speaker 1:02:07

If today's episode helped you, I'd love for you to share it with another nurse practitioner who's trying to build confidence in integrative medicine. And if you're ready to go deeper, that's exactly what we do inside Bridgewell Integrative Education, every course, every case, every framework. It is designed to help you think like an experienced integrative clinician, not just memorize protocols. Next week, we're moving into one of my favorite topics, bloating and constipation. We'll talk about why they almost always travel together, what to fix first, when advanced testing makes sense, and how to build a simple, logical approach that you can use in practice immediately. Until then, remember patients don't need a clinician who knows every answer. They need a clinician who knows how to ask the next right question. I'm Dr. Sheri Erwin. Thank you for spending part of your day with me. I'll see you next time on the Integrative Clinician.