Experts Say It’s Time to Rethink Endometriosis as a Whole-Body Disease

A woman with persistent migraines might see a neurologist. Chronic bloating and bowel problems could send her to a gastroenterologist. Debilitating fatigue might lead to blood tests, dietary changes, and appointments with entirely different specialists. None of those symptoms immediately scream endometriosis.

And that may be part of the problem.

Women with endometriosis can wait around a decade from their first symptoms to diagnosis. The condition has traditionally been associated with painful periods, pelvic pain, and infertility, so symptoms appearing elsewhere in the body can seem unrelated, both to patients and the doctors treating them.

But that traditional picture of endometriosis is beginning to change. New research is finding connections between the disease and health problems involving the gut, immune system, nervous system, and even cardiovascular health. Scientists are now asking whether endometriosis should be understood not simply as a reproductive or pelvic disorder, but as something that can affect the body much more broadly.

For women who have spent years wondering whether their seemingly unrelated symptoms could somehow be connected, the emerging science may finally be starting to connect some of those dots.

How endometriosis affects the whole body

Scientists increasingly describe endometriosis as a chronic, systemic, inflammatory disorder rather than a localized pelvic problem. That shift in classification matters enormously for how symptoms are interpreted.

Beyond the pelvis, the condition produces ongoing low-grade inflammation that circulates through the body and may interfere with systems far removed from where the original tissue is growing. Immune signaling molecules called cytokines, which act as chemical messengers that tell the immune system how to respond, do not stay neatly confined to the pelvic region. They travel through the bloodstream, and higher levels of certain cytokines, including IL-6, have been linked to poor concentration, disrupted sleep, and fatigue in people living with chronic inflammatory conditions. Researchers suspect the same mechanisms are active in endometriosis, meaning that the profound daily exhaustion many women with the condition describe may have a concrete biological explanation rather than being dismissed as a secondary effect of chronic pain.

These non-pelvic endometriosis symptoms are rarely emphasized in clinical guidelines, yet they are often just as disruptive as pelvic pain itself. That gap between what patients experience and what guidelines acknowledge is, in part, why so many women spend years bouncing between specialists before getting a correct diagnosis.

Hundreds of associated conditions identified in large study

The most comprehensive recent look at endometriosis’s reach came from an analysis of electronic health records from more than 43,000 patients across six University of California medical centers. That 2025 study in Cell Reports Medicine compared women who had an endometriosis diagnosis against similar-aged women without one and identified hundreds of significantly associated conditions. The list extended well beyond gynecological symptoms to include asthma, autoimmune diseases, migraines, gastroesophageal reflux, and vitamin D deficiency.

The researchers noted that association does not prove causation. Having endometriosis doesn’t establish that the condition directly caused every associated problem on that list. Some shared conditions may reflect overlapping genetic risk, some may arise from immune dysfunction, and some may be a consequence of living with chronic pain over years. The findings nonetheless suggest that the body-wide pattern of illness in endometriosis patients is real, consistent, and far broader than the traditional picture of the disease.

Up to 90% of women with endometriosis experience gastrointestinal symptoms including constipation, bloating, and nausea, according to research published in 2025. Women with endometriosis are 3 to 5 times more likely to develop irritable bowel syndrome than women without the condition. That figure becomes more striking in context: only about 8% of women with endometriosis have lesions that actually affect the bowel, yet the vast majority report gastrointestinal symptoms.

In most cases, gut trouble is not explained by tissue growing directly on the bowel. Systemic inflammation is the leading candidate explanation, though the precise mechanisms remain under investigation.

Migraines tell a similar story. A 2025 meta-analysis in The Journal of Headache and Pain, covering more than 331,000 individuals across 13 studies, found that endometriosis was significantly associated with migraine without aura, with an odds ratio of 2.64. A woman who sees a neurologist for migraines and separately sees a gynecologist for pelvic pain may never get the connecting question asked, because clinical systems are not yet designed to look for the link.

A whole-body immune problem

Women with endometriosis face a substantially elevated risk of developing autoimmune diseases. Observational studies suggest a 30 to 80% increased risk depending on the condition being measured, including rheumatoid arthritis and multiple sclerosis. The Cell Reports Medicine study found that people with endometriosis had roughly twice the odds of being diagnosed with an autoimmune condition compared to those without it.

Research suggests that pro-inflammatory cytokines released by endometrial lesions play a role in the development of various autoimmune diseases, pointing to a shared inflammatory environment rather than two separate conditions developing independently. The immune system in endometriosis appears to be in a state of sustained disruption, and that state may create conditions where other immune-related conditions take hold.

Cardiovascular health is also emerging as an area of concern. A 2025 systematic review and meta-analysis published in BMC Public Health that pooled six studies and more than 655,000 participants found that women with endometriosis had a 23% higher risk of developing cardiovascular disease and a 13% higher risk of hypertension compared to women without the condition. These are associations drawn from observational data, not proven consequences, and researchers are still working to understand why they exist. The findings add weight to the argument that endometriosis needs to be managed as something broader than a pelvic condition.

The disease can also appear in places that no one thinks to look. Endometrial lesions have been documented at locations outside the pelvis, including the bowel, bladder, lungs, and central nervous system, meaning that in some patients, the tissue itself has physically spread beyond the reproductive organs. Symptoms like shortness of breath timed to a menstrual cycle, shoulder pain, or cyclic bloody urine, while rare, can trace back to lesions in locations doctors rarely suspect.

Research from the large UC health-system dataset found that the co-occurrence of anxiety and endometriosis was associated with notably higher odds of asthma and allergic rhinoconjunctivitis, suggesting that the immune, respiratory, and mental health systems may all be entangled in ways that current specialty-based medicine struggles to capture. Women with endometriosis who also live with anxiety may face a compounded immune burden that remains invisible when each condition is treated separately.

Why getting a diagnosis takes so long

The average time from symptom onset to endometriosis diagnosis is approximately 10 years. Those delays result in increased symptom severity, diminished quality of life, and worse long-term reproductive outcomes. Research on diagnostic delay has found that the gap is still primarily driven by physicians rather than patients, underscoring the need for increased clinical awareness and targeted diagnostic approaches.

The multi-system picture of endometriosis is a major reason the delay persists. When a woman arrives at a gastroenterologist’s office with bloating and bowel changes, or at a neurologist’s with migraines, endometriosis is rarely on the list of possible diagnoses. Each specialist treats their slice of the presentation. According to the World Health Organization, endometriosis affects roughly 190 million women of reproductive age worldwide – approximately 10% of that population – making it one of the most common chronic conditions in women globally, yet one of the least understood in terms of its full body-wide impact.

The broader symptom picture could help change this. Researchers involved in the large UC health-system study have suggested that if future research confirms the links they identified, clinicians could use combinations of seemingly unrelated symptoms as flags. A neurologist seeing a woman for migraines who also reports pelvic pain and digestive issues, for example, would have reason to refer for endometriosis evaluation earlier, potentially cutting years off the diagnostic journey.

You can learn more about how endometriosis interacts with other chronic conditions in this overview of how endometriosis affects the whole body.

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The search for a simpler test

Currently, a definitive endometriosis diagnosis requires a surgical biopsy – a procedure that is invasive, expensive, and out of reach for many women. The search for a less invasive alternative is one of the most active areas in endometriosis research, though most candidates are still experimental.

A 2025 multicenter external validation study, published in NEJM Evidence, validated a 109-microRNA saliva signature as a potential non-invasive biomarker for endometriosis diagnosis. The signature combines microRNA profiling with artificial intelligence modeling. MicroRNAs are short molecules, roughly 20 to 25 building blocks long, that help control which genes in a cell get switched on or off. Detecting a specific pattern of them in saliva could, in theory, flag endometriosis without any surgical procedure, but the approach requires broader validation across more diverse populations before it could be considered for clinical use.

Blood-based approaches are also in development. Researchers have proposed measuring fragments of genetic material called cell-free DNA, as well as specific chemical tags on genes, in ordinary blood samples as potential ways to detect endometriosis without surgery. Like the saliva test, these methods remain in the investigational stage and are not ready for routine clinical use. What they represent is a scientific recognition that better tools are needed, and that those tools will likely come from understanding endometriosis as a condition with measurable signals throughout the body, not only in pelvic tissue.

From a research standpoint, that broader view reshapes where scientists look for biomarkers, which specialists are involved in care, and how long a woman waits before anyone connects her symptoms to a single underlying cause.

What this means for you

If you have been living with a cluster of symptoms that don’t add up under a single diagnosis – particularly some combination of pelvic or menstrual pain alongside chronic fatigue, digestive problems, migraines, urinary symptoms, or a history of autoimmune issues – raising endometriosis explicitly with your doctor is worth doing. You don’t need to wait for a specialist to suggest it. Ask directly whether endometriosis could explain your broader symptom picture, and whether a referral to a gynecologist with endometriosis expertise is appropriate.

The science does not yet support using any blood or saliva test to rule endometriosis in or out outside of a research setting. A tissue biopsy obtained during laparoscopic surgery remains the only confirmed diagnostic method. What has changed is the scientific understanding of what endometriosis actually is: a chronic inflammatory condition capable of affecting the immune system, the gut, the cardiovascular system, the nervous system, and more. That understanding will not shorten your personal diagnostic wait on its own, but knowing it is real, documented, and increasingly recognized by researchers gives you firmer ground to advocate for the evaluation you may have long needed.

Disclaimer: This information is not intended to be a substitute for professional medical advice, diagnosis, or treatment and is for information only. Always seek the advice of your physician or another qualified health provider with any questions about your medical condition and/or current medication. Do not disregard professional medical advice or delay seeking advice or treatment because of something you have read here.

AI Disclaimer: This article was created with the assistance of AI tools and reviewed by a human editor.

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