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Adenomyosis: The Invisible Condition Affecting 1 in 5 Women

Adenomyosis is as common as endometriosis yet far less discussed. Painful, heavy periods and a "boggy uterus" are not something you should simply accept.

DR

Dr. Rachel Moore

Gynaecologist

April 21, 2026
8 min read
Clinician reviewed
Adenomyosis: The Invisible Condition Affecting 1 in 5 Women

What Is Adenomyosis?

Adenomyosis occurs when the endometrial tissue (the lining of the uterus) grows into the muscular wall of the uterus (myometrium). This causes the uterus to become enlarged, tender, and what gynaecologists call "boggy." Unlike endometriosis, which involves tissue growing outside the uterus, adenomyosis is entirely contained within the uterus, making it invisible on standard imaging until recently.

Symptoms That Should Not Be Accepted as Normal

Heavy, painful periods are the most common symptoms, often dramatically heavier than average, with large clots, severe cramping, and significant anaemia. Pelvic pressure, painful sex, painful defecation around menstruation, and a feeling of uterine heaviness or bloating are also common. These symptoms significantly impact quality of life and should be investigated, not accepted.

Diagnosis and Treatment

Until recently, adenomyosis could only be definitively diagnosed at hysterectomy. MRI imaging has transformed non-surgical diagnosis, and experienced transvaginal ultrasound in specialist hands is also reliable. Treatment depends on symptoms and future fertility plans: hormonal management (Mirena IUD, continuous combined pill, GnRH agonists) can significantly reduce symptoms. Uterine-sparing surgery is possible in some cases. Hysterectomy is curative but only appropriate once childbearing is complete if that matters to you.

Medical Disclaimer

This article is written for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making health decisions.

DR

Dr. Rachel Moore

Gynaecologist

All TryHerCare articles are written and reviewed by qualified medical professionals. Our content is clinician-reviewed to ensure accuracy and clinical relevance.