Why does adenomyosis cause painful periods?

Painful Periods is a common presentation of Adenomyosis. Cells similar to the uterine lining are found within the muscular wall of the uterus. Around a period, these cells respond to reproductive hormones and bleed or swell inside tissue that cannot expand easily. The surrounding muscle may become irritated, and inflammatory signals can increase tenderness.

The uterus also contracts to shed its lining. When the muscle wall is affected by adenomyosis, contractions may feel stronger or more prolonged. Pain can begin before bleeding, continue through the heaviest days, or spread into the lower back and thighs. Heavy bleeding and pelvic pressure may occur alongside cramps, but symptoms vary.

Keep a record of when pain starts, how long it lasts, bleeding changes, and whether it affects work, sleep or movement. Heat applied to the lower abdomen, gentle activity and rest may help some people. A clinician can discuss pain medicines that are suitable for you and hormonal options that may reduce bleeding or menstrual pain. Treatment choice depends on symptoms, pregnancy plans, other conditions and medicines.

Arrange an assessment if period pain is new, worsening, interrupts ordinary activities, or occurs with unusually heavy bleeding, pain between periods or pain during sex. Seek urgent help for severe or sudden pelvic pain, fainting, marked weakness, fever, or bleeding that makes you feel unwell. These features need assessment because adenomyosis is not the only possible cause.

Ask whether your pattern of pain and bleeding could fit adenomyosis, whether an examination or imaging would help, and which treatments match your pregnancy plans. You can also ask how to monitor worsening symptoms and when a follow-up review is needed.