The Gut-Brain Axis: Why Anxiety Lives in Your Stomach
The gut and the brain are in constant, bidirectional communication through a network of neural, endocrine, and immune pathways known as the gut-brain axis (GBA). This is not a metaphor, it is an anatomical reality. The enteric nervous system, sometimes called the “second brain,” lines the entire gastrointestinal tract and communicates continuously with the central nervous system via the vagus nerve and the hypothalamic-pituitary-adrenal (HPA) axis, the system that regulates the body’s stress hormone response.
When the sympathetic nervous system activates during anxiety, stress hormones including cortisol and adrenaline bind to adrenergic receptors throughout the GI tract, directly altering gut motility — the rhythmic contractions that move food through the digestive system — as well as acid secretion, intestinal permeability, and blood flow to the gut (Khatri et al., 2021). The result can be stomach pain, cramping, nausea, diarrhea, constipation, or a general sense of GI distress that has no identifiable structural cause. These are not imagined symptoms. They are the measurable physiological output of a nervous system under sustained stress.
What the Research Shows About Anxiety and GI Symptoms
A cross-sectional study of 491 psychiatric outpatients and 85 healthy controls found that somatic trait anxiety, psychic trait anxiety, and stress susceptibility were independent predictors of gastrointestinal symptom burden, even after controlling for relevant confounders (Söderquist et al., 2020). Notably, GI symptoms were both highly prevalent and diverse across the patient population regardless of psychotropic medication status — meaning the gut symptoms were not artifacts of medication but genuine expressions of the underlying anxiety condition.
This is consistent with what we see clinically: people who experience anxiety as a primarily physical phenomenon often present with GI complaints first, sometimes going through extensive workups for irritable bowel syndrome (IBS) or other functional GI disorders before the anxiety connection is identified. IBS — characterized by abdominal pain, cramping, and altered bowel habits — has one of the highest rates of psychiatric comorbidity of any functional medical condition, and anxiety is among the most commonly identified contributors. For a broader look at how anxiety can cause stomach pain, our earlier post covers the foundational connection in detail.
Why Healthcare Workers Are Particularly Vulnerable
The research on healthcare worker mental health is extensive and consistent. Burnout rates among US healthcare workers ranged from 30.4% to 39.8% annually across a six-year period spanning the pandemic, with primary care physicians reaching 57.6% at peak — and anxiety is among the most prevalent mental health conditions identified in this population (Mohr et al., 2025). Healthcare workers face a specific constellation of occupational stressors: sustained high cognitive load, ethical distress from resource constraints, shift work that disrupts circadian regulation, chronic exposure to suffering and death, and a professional culture that often treats self-disclosure of mental health symptoms as a liability.
That last factor matters. Many healthcare workers have seen the professional consequences of colleagues who disclosed mental health struggles — licensing concerns, stigma from peers, a sense of diminished professional identity. We are direct about this reality: if you are a clinician or other healthcare professional who has been reluctant to address your own anxiety because of what it might mean professionally, we understand. Our consultations are confidential, and we are not here to judge your history of self-sufficiency. We are here to help. You can learn more about our team and how we approach care before your first visit.
The physical symptoms of anxiety, including GI distress, often serve as the first signal that a healthcare worker’s nervous system has exceeded its adaptive capacity. Stomach pain, nausea before shifts, bowel irregularity that correlates with work schedules, and persistent abdominal discomfort that clears on days off are all patterns worth taking seriously.
Distinguishing Anxiety-Related GI Symptoms from Other Causes
Not every case of stomach pain is anxiety-related, and we are not suggesting that physical symptoms should be dismissed without appropriate evaluation. If you are experiencing GI symptoms that are new, severe, include blood, or are accompanied by unexplained weight loss, these warrant a thorough medical workup regardless of your anxiety history.
That said, anxiety-related GI symptoms have recognizable patterns: they often fluctuate with stress levels, worsen before or during high-pressure situations, improve during periods of rest or vacation, and are not explained by structural findings on imaging or endoscopy. If your GI symptoms follow these patterns, the most effective path forward may not be another GI intervention but addressing the anxiety driving them.
The relationship is also bidirectional. Just as anxiety can produce gut symptoms, chronic GI distress can maintain and amplify anxiety by sending continuous distress signals back up the gut-brain axis to the brain — creating a feedback loop that neither organ can resolve on its own. Breaking that loop often requires addressing the anxiety component directly.
Treatment Options for Anxiety at The Invictus Clinic
Our approach to anxiety starts with understanding the full picture of how it is affecting you — including physical symptoms. We do not assume that stomach pain or GI distress requires a separate specialist referral before the anxiety connection is explored. Our free initial consultation reviews your complete history: symptom patterns, prior treatments, physical manifestations, and what has or has not helped.
For healthcare workers and others whose anxiety has not adequately responded to therapy, standard medications, or self-management, we offer IV ketamine infusion therapy and additional treatment options, which work through the glutamate system rather than the serotonin system targeted by most conventional anxiety treatments, and SPRAVATO® (esketamine), the FDA-approved nasal spray for treatment-resistant depression that may address associated anxiety symptoms. We also offer IV vitamin therapy and NAD+ infusions as part of a broader approach to nervous system support.
A study conducted specifically in a healthcare worker population found that daily progressive muscle relaxation sessions over 7 consecutive days produced significant reductions in anxiety levels among practitioners experiencing high-stress occupational environments — underscoring that even brief, structured interventions can produce measurable change in this population (Luo et al., 2024). We discuss the full range of options with you and make recommendations based on your individual history, not a protocol.
We accept Anthem Blue Cross Blue Shield, Aetna, and Medicare, and we work with CareCredit for patients who need flexible payment options. We discuss all costs transparently before any treatment begins. Results vary by individual, and we will never suggest otherwise.
Frequently Asked Questions
How do I know if my stomach pain is from anxiety rather than a GI condition?
Anxiety-related GI symptoms typically fluctuate with stress levels, worsen in anticipation of high-pressure situations, improve during rest, and are not explained by structural findings on imaging or endoscopy. If you have had a thorough GI workup with no clear structural cause identified and your symptoms correlate with anxiety and stress patterns, anxiety is a reasonable focus for further evaluation. Discuss your full history with a provider who can assess both dimensions.
Is it possible to have both a GI condition and anxiety-related symptoms at the same time?
Yes, and it is common. Anxiety and functional GI disorders like IBS frequently co-occur and can mutually reinforce each other through the gut-brain axis. Having one does not exclude the other, and addressing only the GI component without treating the anxiety often produces incomplete results. A provider familiar with both dimensions can help you think through the right combination of approaches.
Why do healthcare workers seem to dismiss their own physical symptoms?
Healthcare training emphasizes objective, measurable pathology — which can make it harder to take seriously symptoms that do not fit neatly into a structural diagnosis. There is also a professional culture in medicine and nursing that equates self-sufficiency with competence, and seeking help with anxiety can feel inconsistent with that identity. These are real dynamics, not character flaws, and they are worth naming directly when you decide to pursue care.
Can treating anxiety actually resolve GI symptoms?
Research supports that addressing anxiety can significantly reduce gut symptoms in people whose GI distress is driven by the anxiety-gut connection. Because the relationship is bidirectional, reducing anxiety reduces the sympathetic nervous system signals that are disrupting gut function. Some patients see GI symptoms improve substantially as anxiety treatment takes effect — though results vary by individual and the presence of co-occurring GI conditions will affect outcomes.
Does The Invictus Clinic offer treatment specifically for healthcare workers?
We offer treatment to anyone whose anxiety or mental health condition has not responded adequately to standard approaches, and we have significant experience with healthcare workers. We offer a 25% discount on IV ketamine, NAD+, and vitamin infusions for active military, veterans, and first responders, and we approach all consultations with an understanding of the professional context our patients are navigating.
Key Takeaways
- Anxiety-related stomach pain is a real physiological response driven by the gut-brain axis, which links the brain and GI tract through direct neural, hormonal, and immune pathways.
- Research confirms that trait anxiety is an independent predictor of gastrointestinal symptom burden — GI symptoms in anxious individuals are not psychological but measurable physiological outputs of the stress response.
- Healthcare workers are at elevated risk for anxiety and its physical manifestations due to sustained occupational stress, and professional stigma around mental health disclosure is a significant barrier to care in this population.
- Anxiety-related GI symptoms tend to fluctuate with stress levels, improve during rest, and are typically not explained by structural GI findings.
- For anxiety that has not responded to standard treatment, IV ketamine and SPRAVATO® offer pathways that work through different neurological mechanisms and may produce relief where conventional approaches have fallen short.
Stomach pain that tracks your work schedule is not a coincidence. If you are a healthcare worker whose anxiety is showing up in your body and you have not found adequate relief through the usual approaches, we are here to have a direct, confidential conversation about what else is available. Call us at 770-580-1042 or schedule a free consultation at our Marietta clinic at 1545 Powers Ferry Rd, Suite #120.
References
Khatri, R. K., Chocron, I. M., Delgado, J. B., & Alexander, T. R. (2021). Understanding the connection between the gut-brain axis and stress/anxiety disorders. Current Psychiatry Reports, 23(5), 22. https://pubmed.ncbi.nlm.nih.gov/33712947/
Luo, Y., Du, J., Wang, J., Liu, P., Shi, Z., He, Y., Che, G., Huang, K., & Wang, J. (2024). Progressive muscle relaxation alleviates anxiety and improves sleep quality among healthcare practitioners in a mobile cabin hospital. Frontiers in Psychology, 15, 1337318. https://pmc.ncbi.nlm.nih.gov/articles/PMC11091277/
Mohr, D. C., Elnahal, S., Marks, M. L., Derickson, R., & Osatuke, K. (2025). Burnout trends among US health care workers. JAMA Network Open, 8(4), e255954. https://pmc.ncbi.nlm.nih.gov/articles/PMC12013355/
Söderquist, F., Syk, M., Just, D., Kurbalija Novicic, Z., Rasmusson, A. J., Hellström, P. M., Ramklint, M., & Cunningham, J. L. (2020). A cross-sectional study of gastrointestinal symptoms, depressive symptoms and trait anxiety in young adults. BMC Psychiatry, 20(1), 535. https://pubmed.ncbi.nlm.nih.gov/33176747/
Medical Disclaimer: The information in this blog is for educational purposes only and does not constitute medical advice. Gastrointestinal symptoms should be evaluated by a qualified healthcare provider to rule out structural causes before attributing them to anxiety. Treatment options including IV ketamine and SPRAVATO® require a thorough medical evaluation and are not appropriate for everyone. Individual results vary. If you are experiencing a mental health crisis, please call or text 988 to reach the Suicide and Crisis Lifeline or go to your nearest emergency room.
