What Is Endometriosis?

Endometriosis is a chronic inflammatory condition in which tissue similar to the endometrium (the lining inside the uterus) grows outside the uterus — on the ovaries, fallopian tubes, bladder, bowel, or pelvic lining. This misplaced tissue behaves like the uterine lining: it builds up, breaks down, and bleeds with each cycle — but has no way to exit the body. This causes inflammation, scarring, adhesions, and significant pain.

Endometriosis affects an estimated 1 in 10 people with a uterus worldwide — approximately 190 million people — yet average diagnosis is delayed 7–10 years from symptom onset.

Symptoms of Endometriosis

Core Symptoms

• Painful periods (dysmenorrhea) — Severe cramping that worsens over time; often not relieved by standard pain medication
• Chronic pelvic pain — Pain that persists beyond menstruation
• Painful intercourse (dyspareunia) — Deep pain during or after sex
• Painful bowel movements or urination — Especially during menstruation
• Heavy or irregular bleeding — Including spotting between periods
• Infertility — Approximately 30–40% of people with endometriosis experience fertility challenges

Other Common Symptoms

• Fatigue — Often described as profound exhaustion
• Bloating ("endo belly") — Severe abdominal distension, especially during menstruation
• Nausea, especially during periods
• Back and leg pain
• Psychological impact: anxiety and depression are significantly higher in those with endometriosis

Why Is Endometriosis Often Misdiagnosed?

The average diagnostic delay of 7–10 years exists because:

• Painful periods are frequently dismissed as "normal"
• Symptoms overlap with IBS, bladder conditions, and other conditions
• Definitive diagnosis requires laparoscopic surgery (imaging alone is insufficient)
• Lack of awareness among both patients and some healthcare providers
• Symptoms vary enormously between individuals

Endometriosis Stages

Endometriosis is classified into 4 stages (I–IV) based on the extent and location of lesions:

• Stage I (Minimal): Isolated lesions, no significant adhesions
• Stage II (Mild): More lesions, slight adhesions
• Stage III (Moderate): Deep lesions, endometriomas (ovarian cysts), significant adhesions
• Stage IV (Severe): Widespread deep lesions, large endometriomas, dense adhesions involving other organs

Note: Stage does not correlate with pain severity. Minimal endometriosis can cause severe pain; severe endometriosis may cause little pain.

Diagnosis

The gold standard for diagnosis is laparoscopy — a surgical procedure in which a camera is inserted into the abdomen to directly visualize and biopsy endometriosis lesions. No blood test or imaging can definitively diagnose endometriosis, though MRI and ultrasound can detect endometriomas and deep lesions in experienced hands.

Treatment Options

Pain Management

• NSAIDs (ibuprofen, naproxen) — first-line for pain
• Heat therapy
• Physical therapy (pelvic floor PT)
• Nerve blocks for severe chronic pain

Hormonal Therapies

Hormonal treatments suppress the hormonal fluctuations that drive endometriosis growth:

• Combined oral contraceptive pill (continuous use to skip periods)
• Progestin-only methods (hormonal IUD, implant, depo injection)
• GnRH agonists/antagonists (Lupron, Orilissa) — induce temporary menopause; used for limited periods due to bone density concerns
• Norethisterone and dienogest (progestins with evidence for endometriosis)

Surgical Treatment

• Conservative laparoscopy — Excision or ablation of lesions; preserves fertility
• Hysterectomy — Only considered for severe cases in those who do not want future pregnancy; does not guarantee complete symptom resolution if ovaries are retained

Fertility Treatment

For those trying to conceive with endometriosis-related infertility:

• Laparoscopic surgery to remove adhesions and endometriomas
• IUI or IVF depending on extent of disease

How to Track Endometriosis Symptoms

Consistent symptom tracking is especially important for people with or suspected endometriosis. Recording:

• Pain location, intensity (1–10), and timing in your cycle
• Associated symptoms (bowel issues, nausea, fatigue)
• Which activities trigger or worsen pain

This data is invaluable for your gynecologist in assessing disease activity and treatment response.

Frequently Asked Questions

Can endometriosis be cured?

There is currently no cure for endometriosis. However, with appropriate treatment, symptoms can be well-managed and quality of life significantly improved. After surgical excision, recurrence rates vary (10–55% over 5 years depending on severity and post-operative hormonal management).

Does endometriosis always cause infertility?

No. Many people with endometriosis conceive naturally. However, endometriosis can reduce fertility by affecting the ovaries, tubes, and uterine environment. Severity of disease generally correlates with degree of fertility impact, though even Stage I can affect fertility in some cases.

If I have no pain, can I still have endometriosis?

Yes. "Silent" endometriosis — with no or minimal symptoms — is discovered incidentally during surgery or investigation for infertility. Symptom severity does not reliably reflect disease extent.