Endometriosis Symptoms: What They Really Mean

You've been told your cramps are normal. That painful sex is something you just deal with. That showing up to the ER during your period means you have a low pain tolerance.

None of that is true.

Endometriosis affects roughly 1 in 10 women of reproductive age — about 190 million people worldwide (Zondervan et al., 2020). And yet the average woman waits 7 to 10 years from the time her endometriosis symptoms start to the time she gets a diagnosis (Diary of a CEO, 2025). Seven to ten years of being dismissed, misdiagnosed, and told to just take ibuprofen.

This article is going to explain what's actually happening in your body, what the symptoms really look like beyond "bad periods," how diagnosis works, and what treatment options genuinely exist, including newer hormonal therapies most women have never heard of.

What Is Endometriosis, Exactly?

Endometriosis is a condition where tissue that behaves like the lining of your uterus grows outside the uterus, on the ovaries, fallopian tubes, bowel, bladder, or elsewhere in the pelvic cavity (Zondervan et al., 2020).

Each month, that tissue responds to your hormones the same way the uterine lining does. It thickens, breaks down, and tries to bleed. But because it's outside the uterus, there's nowhere for that blood to go. The result is inflammation, scar tissue (adhesions), and pain that can become chronic and severe (Saunders & Horne, 2021).

The cause isn't fully understood. The most widely accepted theory is retrograde menstruation (period blood flowing backward through the fallopian tubes into the pelvic cavity). But that can't explain everything, because most women have some retrograde menstruation without developing endometriosis. Immune system dysfunction and hormonal factors (particularly estrogen dominance) likely play a role in why some tissue implants and survives while others don't (Saunders & Horne, 2021).

One thing researchers are clear on: stage of disease does not predict severity of symptoms. Women with minimal visible disease can have debilitating pain. Women with extensive endometriosis sometimes have none. The pain experience is not a reliable indicator of how much disease is present (Vercellini et al., 1996).

What Endometriosis Symptoms Actually Look Like

The most recognizable endometriosis symptom is pelvic pain. But calling it "bad periods" wildly undersells the reality. Here's the full picture of what this condition can cause.

Pain During Your Period (Dysmenorrhea)

This is the symptom most people associate with endometriosis. But there's a difference between "my period hurts" and "I cannot get off the bathroom floor." Endometriosis-related menstrual pain is often severe enough to interfere with work, school, and daily activity (Bernardi et al., 2017).

Dr. Jolene Brighten, a hormone specialist who treats endometriosis daily, puts it plainly: "If you're curled up in the fetal position on the floor during your period, that is not normal." That clarity matters because many women have been told for years, by doctors and family members alike, that their pain is within a normal range.

Pain During Sex (Dyspareunia)

Pain during or after penetrative sex is one of the more stigmatized symptoms, because it directly affects relationships and is rarely brought up in appointments. In a cross-sectional survey of nearly 59,000 US women, 29.5% of those with endometriosis reported dyspareunia compared to 13.4% without the condition (Fuldeore & Soliman, 2016).

Deep pain during sex (particularly in certain positions) often means endometriosis lesions are near the ligaments supporting the uterus or in the rectovaginal space.

Pelvic Pain Between Periods

This is the symptom that most confuses women and their doctors. If pain only happened during menstruation, the endometriosis connection would be more obvious. But 36.7% of women with endometriosis in the same survey reported non-menstrual pelvic pain, compared to 14.3% without the condition (Fuldeore & Soliman, 2016).

Chronic pelvic pain between periods can result from active lesions, adhesions that restrict organ movement, or central sensitization of the nervous system, meaning the pain system itself has been rewired by years of repeated pain input (Aredo et al., 2017).

Bowel and Bladder Symptoms

When endometriosis involves the bowel or bladder, the symptoms can be easy to dismiss as digestive problems or a UTI. Watch for:

• Painful bowel movements, especially during your period
• Diarrhea or constipation that tracks with your cycle
• Bloating (sometimes called "endo belly")
• Blood in urine or pain with urination

Deep infiltrating endometriosis (DIE) involves lesions that penetrate more than 5mm beneath the peritoneal surface and commonly affects the bowel and bladder (Koninckx & Martin, 1993). It requires specialized surgical evaluation, not just pain management.

Fatigue

Fatigue in endometriosis isn't just "tired from the pain." Research shows higher rates of conditions like chronic fatigue syndrome, fibromyalgia, and hypothyroidism in women with endometriosis compared to the general population (Sinaii et al., 2002). Chronic inflammation, immune dysregulation, and disrupted sleep from pain all contribute.

Systemic fatigue that doesn't respond to sleep is a legitimate symptom worth bringing to your provider — not a sign of anxiety or weakness.

Infertility

Up to 50% of women with unexplained infertility have endometriosis (Diary of a CEO, 2025). This is one of the more striking figures in the literature, and it's a direct consequence of how underdiagnosed this condition is. Women spending years trying to conceive without a diagnosis are often dealing with endometriosis that was never found because it was never looked for.

The Diagnostic Delay Problem

Seven to ten years. That's how long the average woman with endometriosis waits for a diagnosis after symptoms begin (Agarwal et al., 2019). In a conversation on the Huberman Lab podcast, Dr. Thaïs Aliabadi, an OB/GYN who specializes in this condition, framed it this way: endometriosis is the leading cause of infertility on this planet, yet 90% of women aren't diagnosed. "Every single ophthalmologist knows about cataracts. So why is it that a woman can go to 20 different doctors with endometriosis and still not have a diagnosis?"

The delay isn't random. It has structural causes:

Pain normalization. Menstrual pain gets dismissed as part of being a woman, even at the level of formal medical education. Women who report severe dysmenorrhea are often told to take OTC pain relievers and come back if things get worse.

Symptom overlap. Endometriosis mimics irritable bowel syndrome, interstitial cystitis, pelvic inflammatory disease, and anxiety. Each of those diagnoses can come before the correct one.

Definitive diagnosis requires surgery. This is the core problem. The gold standard for endometriosis diagnosis is laparoscopy with biopsy, which means a surgeon has to physically look inside the pelvic cavity and take a tissue sample to confirm it histologically (Saunders & Horne, 2021). You can't diagnose it with a blood test or urine culture. Ultrasound can detect large endometriomas (ovarian cysts caused by endometriosis) but often misses surface lesions entirely.

What this means practically: A woman can have normal bloodwork, a normal pelvic exam, and a normal transvaginal ultrasound and still have endometriosis. A negative workup is not the same as a clean bill of health.

The diagnostic standard being called for by leading researchers is a shift toward clinical diagnosis (using a thorough symptom history, physical examination findings, and response to hormonal treatment) rather than requiring surgery to confirm before any treatment begins (Agarwal et al., 2019).

How Endometriosis Is Diagnosed

When you see a physician for suspected endometriosis, here's what a thorough evaluation looks like.

Symptom history. A detailed account of your pain patterns: when pain occurs, its severity, how it's changed over time, how it relates to your cycle. Note that symptom severity does not track with disease stage, so even "mild" symptoms deserve investigation.

Pelvic examination. A skilled examiner may find uterosacral ligament tenderness, uterine immobility (the uterus is stuck rather than freely mobile), or a fixed retroverted uterus. All of these raise clinical suspicion.

Imaging. Transvaginal ultrasound is the first-line imaging choice and can detect endometriomas or deeply infiltrating lesions near the rectovaginal septum. MRI provides better visualization of deep infiltrating endometriosis and is useful for surgical planning.

Hormonal treatment trial. Many gynecologists will offer hormonal suppression as a diagnostic and therapeutic trial. If your symptoms improve significantly on hormonal therapy, that's strong clinical evidence of endometriosis even without surgical confirmation.

Laparoscopy. Surgical confirmation is still the definitive standard. It allows direct visualization, staging by the ASRM classification system (Stage I through IV), and simultaneous treatment. The decision to pursue surgery depends on your symptoms, imaging findings, fertility goals, and response to medical therapy.

Endometriosis Treatment Options

There is no cure for endometriosis. But there are effective ways to manage symptoms, slow disease progression, and protect fertility. The goal of treatment depends on your priorities: pain control, fertility, or both.

Hormonal Treatments

Endometriosis is driven by estrogen. Hormonal therapies work by either suppressing ovulation (which reduces the monthly hormonal cycle that drives endometrial growth) or by creating a progesterone-dominant environment that suppresses estrogen-responsive tissue.

Combined oral contraceptives (combined OCs). The most commonly prescribed first-line treatment. They reduce menstrual blood flow, suppress ovulation, and lower systemic estrogen. Continuous dosing (skipping placebo pills) can eliminate periods entirely and give significant pain relief. They don't treat existing disease, but they slow its progression (Vannuccini et al., 2021).

Progesterone-only options. Progestins like dienogest, norethindrone acetate, and medroxyprogesterone acetate suppress estrogen-driven tissue growth and can achieve amenorrhea with consistent use. The levonorgestrel intrauterine device (IUD) works locally and is particularly useful for managing menstrual pain in women who want long-term contraception.

GnRH agonists. Older drugs like leuprolide (Lupron) work by initially flooding GnRH receptors, then inducing a hypoestrogenic state. Essentially, they create a medically induced menopause. They're effective for pain, but the bone density loss and menopausal side effects (hot flashes, mood changes) limit their use to 6-month courses with "add-back" therapy.

GnRH antagonists — the newer class. This is where treatment has meaningfully advanced. Elagolix (Orilissa) and relugolix (the combination product Myfembree contains relugolix) are oral GnRH antagonists that work differently from agonists. Rather than flooding and then blocking receptors, they directly block GnRH receptors, suppressing estrogen more rapidly and without the initial hormone flare of agonists (Vannuccini et al., 2021).

The advantage: GnRH antagonists can be dose-adjusted. At lower doses, they partially suppress estrogen, which manages pain while minimizing bone density and menopausal side effects. They're taken daily as a pill, not as an injection. Elagolix was FDA-approved specifically for endometriosis-associated pain. Relugolix combination therapy (with add-back estrogen and progesterone) is FDA-approved for uterine fibroids and has evidence in endometriosis.

Surgical Treatments

When hormonal management isn't sufficient, or when fertility is a priority, surgery becomes part of the conversation.

Excision vs. ablation. This is the most important distinction in endometriosis surgery. Ablation burns or destroys the surface of lesions. Excision cuts them out at the root with clear margins. Dr. Jolene Brighten makes this distinction in clinical terms: once optimal excision is achieved, cutting out whatever is suspicious for endo in whatever form, patients don't need suppression for the sake of preventing endo from coming back — because there's no visible disease left behind. That outcome is simply not achievable with surface ablation.

Excision requires more surgical skill and longer operating time, which is why it's less universally offered. But the recurrence data favors it.

Hysterectomy. Removal of the uterus is reserved for severe, refractory disease in women who have completed their families. Hysterectomy with ovarian preservation carries higher long-term reoperation rates than hysterectomy with ovary removal, because retained ovaries continue to produce estrogen that can drive symptom recurrence (Shakiba et al., 2008).

In a retrospective study of 120 women who underwent hysterectomy for endometriosis, the reoperation-free percentages at 2, 5, and 7 years were 95.7%, 86.6%, and 77.0% with ovarian preservation, versus 96.0%, 91.7%, and 91.7% without it (Shakiba et al., 2008). Removing the ovaries dramatically reduces long-term recurrence, but creates surgical menopause, which is a significant tradeoff for younger women.

Deep infiltrating endometriosis. When endometriosis involves the bowel or bladder, specialized surgical teams (including colorectal surgeons) may be needed. Laparoscopic colorectal resection for DIE with bowel involvement has been shown to improve dysmenorrhea, dyspareunia, and defecation pain, though complication rates are meaningful (Darai et al., 2005; Meuleman et al., 2011).

Endometriosis and Fertility

If you have endometriosis and want to get pregnant, the picture is more nuanced than "you can't."

Mild to moderate endometriosis is compatible with spontaneous conception, but it reduces the odds. Endometriosis can affect fertility through mechanical factors (adhesions that distort tubal anatomy, endometriomas that impair ovarian reserve), inflammatory changes in the peritoneal environment, and effects on egg quality and embryo implantation.

Natalie Crawford, MD, a board-certified reproductive endocrinologist, notes that endometriosis presents differently in every patient, and its impact on fertility can be equally varied. Not everyone with a Stage I diagnosis has the same fertility prognosis.

Several important considerations:

Endometriomas and ovarian reserve. Endometriomas (ovarian cysts caused by endometriosis, also called chocolate cysts) can damage surrounding ovarian tissue. Surgical removal itself also carries risk to the remaining ovarian tissue. A clinical trial comparing laparoscopic cystectomy versus hormonal treatment with dienogest versus watchful waiting for endometriomas found different effects on anti-Müllerian hormone (AMH), the marker of ovarian reserve (NCT05637073). The decision about whether and when to operate on an endometrioma requires weighing pain relief against potential ovarian reserve impact.

IVF for endometriosis. When natural conception isn't occurring, IVF is often the recommended next step. Pregnancy rates following surgery for colorectal endometriosis reach 23-57% in published studies, with cumulative pregnancy rates of 58-70% within four years (Meuleman et al., 2011).

Fertility preservation. For women not yet ready to conceive but concerned about diminishing ovarian reserve from their disease or planned surgery, egg freezing before surgical intervention is worth discussing with a reproductive endocrinologist.

What "unexplained infertility" might actually mean. If you've been told you have unexplained infertility without any prior investigation for endometriosis, a second opinion from a surgeon who specializes in this condition is reasonable.

Cost, Insurance, and How to Get Care

Getting well-managed endometriosis care in the US requires knowing what to ask for. The system defaults to bare minimum.

What hormonal treatment costs. Generic combined oral contraceptives are often covered by insurance with minimal copay. Progestins like norethindrone acetate are affordable as generics. GnRH antagonists like elagolix (Orilissa) cost $700-$900/month without insurance. They often require prior authorization, and insurers frequently require documented failure of first-line hormonal treatment before they'll cover it. Check manufacturer patient assistance programs if cost is a barrier.

Surgery costs. Laparoscopy for endometriosis is generally covered when medically indicated, but costs vary significantly based on facility, surgeon, and insurance plan. Specialized excision surgery from high-volume endometriosis surgeons may involve out-of-pocket costs if they're out-of-network. Given the difference in outcomes between excision and ablation, this is often worth investigating.

Finding the right surgeon. Not every OB/GYN has the skills for advanced excision surgery. The Nancy's Nook Endometriosis Education group maintains a curated list of excision specialists. Seeking care from a high-volume endometriosis surgeon (100+ cases per year) is a meaningful factor in outcomes.

The HEXIS approach. At HEXIS Health, hormonal management for endometriosis starts with your complete hormone panel, not a one-size prescription. Your provider will assess where you are in your cycle, your current estrogen and progesterone levels, any prior hormonal treatment history, and your fertility timeline. From there, we build a protocol that fits your situation, not the average patient's situation. If you've been struggling with endometriosis symptoms and want a provider who will actually engage with your full picture, Schedule a consultation.

We offer telehealth consultations across Montana, Washington, Idaho, and Oregon, and in-clinic visits at our Great Falls, MT location.

Managing Endometriosis Alongside Other Conditions

A common reality in endometriosis is that it coexists with other conditions. Research on 3,680 women with surgically diagnosed endometriosis found dramatically elevated rates of hypothyroidism (9.6% vs 1.5% in the general population), fibromyalgia (5.9% vs 3.4%), chronic fatigue syndrome (4.6% vs 0.03%), and multiple autoimmune conditions (Sinaii et al., 2002).

Managing ADHD medication alongside hormonal symptoms is an area that gets almost no medical guidance, despite being a real challenge. Stimulant medications can amplify anxiety and mood instability that are already elevated with cyclical hormonal shifts. Some women find their ADHD symptoms fluctuate with their cycle in ways that require adjusting medication timing or dose. It's worth tracking and bringing to both your prescribing physicians.

Pain sensitization from years of unmanaged endometriosis can outlast the surgical treatment of the lesions. Physical therapy specifically targeting pelvic floor dysfunction, myofascial trigger points, and central sensitization is an underused but evidence-supported component of care (Aredo et al., 2017).