The short version.

Endometriosis is common, it is not cancer, and it is treatable. It is also often missed. Pain that gets brushed off as “just bad periods” is one of the main reasons diagnosis takes so long.

Knowing the signs, and what to ask, can shorten the path to answers.

What endometriosis is.

Endometriosis occurs when tissue similar to the lining of the uterus grows outside the uterus. That tissue responds to your hormonal cycle. It thickens and bleeds each month, but the blood has nowhere to go, which causes inflammation, scarring and pain.

It is an estrogen-dependent condition, and symptoms usually ease after menopause.

Symptoms to know.

Symptoms vary a lot from person to person.

Endometriosis can also make it harder to get pregnant, and early diagnosis and treatment help.

Pain that keeps you from school, work or daily life deserves to be evaluated, not endured.

Getting diagnosed.

For decades, a diagnosis required surgery. In 2026, ACOG issued its first comprehensive diagnosis guidance, which supports a presumptive clinical diagnosis based on your history, symptoms and physical exam, with imaging when needed. That means treatment can begin without waiting for surgery.

1. A conversation about your symptoms. Your pain, your periods, and how it affects your daily life.
2. A pelvic exam. Your provider checks for tenderness or other signs.
3. Imaging. A transvaginal ultrasound or pelvic MRI can show some forms of endometriosis. Imaging can miss other forms, which is one reason your symptoms matter so much.
4. A clinical diagnosis. Your provider may start treatment based on your symptoms, then see how you respond.
5. Surgery, if you choose it. Laparoscopy can confirm the diagnosis and remove growths. Some people prefer it and others do not, so it is a decision made together.

Before your appointment

• Track your pain on a 0 to 10 scale, and note when it happens in your cycle.
• Note pain with sex, bowel movements or urination, and any missed school or work.
• Write down your family history and any treatments you have already tried.
• Decide what matters most: pain relief, fertility, or both.

Questions worth asking

• Could this be endometriosis, and what else could it be?
• Can we start treatment based on my symptoms?
• Which imaging do you recommend?
• What are my hormonal and non-hormonal options?
• How will treatment affect my plans for pregnancy?
• Should I see a specialist or a pelvic floor physical therapist?

Managing endometriosis.

There is no cure, but there are many ways to manage symptoms. The right plan depends on your symptoms, your goals and whether you want to become pregnant. Treatment usually starts with medication, and a combination of approaches is common.

Everyday support

• Build a care team. Care often involves a gynecologist, a pelvic floor physical therapist and sometimes pain, bowel or bladder specialists.
• Look after your mind. Anxiety and depression are more common in people with endometriosis, and support helps.
• Track what helps. Heat, rest and gentle movement ease cramps for some people. Notes help you and your provider see what works.
• Plan ahead if you want children. Endometriosis can affect fertility, so raise it early.

Fabric, chemicals and endometriosis.

Because endometriosis depends on estrogen, researchers have studied endocrine-disrupting chemicals as a possible factor. A systematic review found that most studies reported an association with BPA and organochlorine pollutants such as dioxins, with some evidence for phthalates.

The evidence is mixed. Another critical appraisal concluded the evidence remains weak because of weaknesses in study design and contradictory findings, and a 2025 review notes that major uncertainties remain about whether these chemicals actually cause endometriosis.

An association is not proof of cause. Many everyday exposures add up, including food packaging, personal care products and household items, and what you wear against your skin is one of the easiest to choose. Where it’s easy, keep unnecessary exposure low:

• Choose certified organic cotton, such as GOTS and OEKO-TEX, for what you wear closest to your skin.
• Wash new underwear before wearing it.
• Use a fragrance-free detergent and skip fabric softener.

To learn more, read Fabric School and the chemical guide.

When to get care.

Sources.

1. Healio. ACOG updates guidance on diagnosing endometriosis (2026).
2. University of Miami Health. New endometriosis guidelines could end years of delayed diagnosis.
3. UT Southwestern. New endometriosis guidelines: a smoother path to effective treatment.
4. Office on Women’s Health. Endometriosis fact sheet.
5. ACOG patient education. Endometriosis (EP013).
6. IQWiG. Endometriosis treatment decision aid.
7. Environmental exposures to endocrine-disrupting chemicals and endometriosis: a systematic review. Reviews on Environmental Health (2021).
8. Environmental toxicants and endometriosis: a systematic review and critical appraisal.
9. Unraveling the core of endometriosis: the impact of endocrine disruptors. International Journal of Molecular Sciences (2025).

This guide is for educational purposes only and is not medical advice, diagnosis or treatment. Talk to a qualified healthcare provider about your symptoms and options.