Endometriosis and intimacy

What it is

Tissue similar to the endometrial lining growing outside the uterus — on the ovaries, peritoneum, bowel, bladder, uterosacral ligaments and, less commonly, further afield. It responds to hormonal cycling, causing inflammation, adhesions and scarring.

It affects roughly 10 percent of people of reproductive age — around 190 million worldwide by WHO estimates. Average time from first symptom to diagnosis is 7–8 years across most health systems.

Why the delay matters

The delay is not incidental. It is produced by a specific pattern: severe period pain normalised as something everyone has; symptoms attributed to anxiety or to a low pain threshold; and imaging that returns clear, since ultrasound and MRI frequently miss superficial peritoneal disease. Laparoscopy remains the definitive diagnostic test, though NICE and ESHRE guidance now supports treating on clinical suspicion rather than requiring surgery before starting management.

Consequences of delay: progressive disease, established central sensitisation that persists after the lesions are treated, fertility impact, and years of painful sex that establishes a protective pelvic floor reflex of its own.

Symptoms

• Severe period pain, often starting before bleeding
• Deep pain during or after penetration (deep dyspareunia) — one of the most characteristic symptoms and among the least often asked about
• Chronic pelvic pain outside the period
• Pain with bowel movements or urination, particularly around the period
• Heavy or irregular bleeding
• Fatigue
• Difficulty conceiving — endometriosis is found in 25–50 percent of people investigated for infertility

Symptom severity correlates poorly with disease stage. Minimal disease can cause severe pain; extensive disease can be nearly silent.

Why sex hurts

Several mechanisms, usually together:

• Deep infiltrating lesions on the uterosacral ligaments and rectovaginal septum, stretched by deep penetration.
• Adhesions fixing organs so they cannot move as they should.
• A retroverted or fixed uterus, making certain angles painful.
• Pelvic floor hypertonicity developed as a guarding response, which frequently persists after surgery and is the reason many people report incomplete relief afterwards.
• Central sensitisation from years of pain input.

The last two explain why treating the lesions alone often does not resolve painful sex, and why pelvic floor physiotherapy belongs in the treatment plan rather than after it fails.

Managing intimacy

• Positions that limit depth and let the person with endometriosis control angle: on top, side-lying, spooning. Deep positions with high force are frequently the trigger.
• Timing. Pain is usually worse around and just before the period. Planning around the cycle is practical, not defeatist.
• Arousal time and lubricant, since inadequate arousal compounds every other source of pain.
• Non-penetrative intimacy as a full option rather than a consolation.
• Analgesia timed to peak during, not after.
• Heat before and after.
• Pelvic floor physiotherapy, which addresses the component surgery cannot.
• Stop when it hurts. Continuing through pain reinforces sensitisation and guarding.

Medical and surgical treatment

Hormonal suppression — combined hormonal contraception used continuously, progestogens including the levonorgestrel IUD, dienogest, and GnRH analogues with add-back therapy. These suppress symptoms; they do not remove lesions, and symptoms typically return on stopping. They are also contraceptive, which matters if conception is the goal.

Excision surgery by a specialist endometriosis centre has better outcomes than ablation for deep disease in comparative studies. Surgery for deep infiltrating disease should be done in a specialist multidisciplinary centre, not opportunistically.

Pain management as a discipline in its own right: neuromodulators, pain neuroscience education, and multidisciplinary pain clinics for established central sensitisation.

Fertility: endometriosis reduces fertility but many people conceive without intervention. Where treatment is needed, surgery and IVF both have roles depending on stage and other factors. Pregnancy is not a treatment for endometriosis — a persistent myth, and one that has caused real harm.

For partners

Believe them. Pain during sex is not a rejection and not something they can override with effort. Ask what helps, accept that it varies week to week, and do not treat the good weeks as proof the bad ones were exaggerated. The relational damage from disbelief is documented in qualitative research as one of the most distressing aspects of the condition.

Sources

• Zondervan KT, Becker CM, Missmer SA. "Endometriosis." NEJM, 2020.
• NICE. Guideline NG73: Endometriosis diagnosis and management.
• Becker CM et al. "ESHRE guideline: endometriosis." Human Reproduction Open, 2022.
• Fritzer N et al. "More than just bad sex: sexual dysfunction and distress in patients with endometriosis." European Journal of Obstetrics & Gynecology, 2013.
• Orr NL et al. "Deep dyspareunia in endometriosis: role of the bladder and pelvic floor." Journal of Sexual Medicine, 2018.
• WHO. Endometriosis fact sheet, current edition.

Last reviewed: August 2026.