Mirena and post-menopausal bleeding: what to know

Mirena releases a progestogen inside the uterus and usually makes the lining thinner. Some people have light bleeding or spotting, especially soon after insertion or when the device is nearing its replacement time. Bleeding that begins after menopause, returns after a quiet interval, or becomes heavier is not something to explain away without an examination.

A clinician may consider changes at the vagina or cervix, polyps, fibroids, thickening of the uterine lining, infection, or a less common serious cause. Conditions such as [Endometrial Hyperplasia](/conditions/endometrial-hyperplasia/) and [Uterine Fibroids](/conditions/uterine-fibroids/) can cause uterine bleeding. The pattern, pelvic symptoms, device history, and examination findings guide the next step.

Arrange a gynaecology assessment and record when the bleeding started, how much appears, whether it follows sex, and whether pain, discharge, dizziness, or fever occurs. Tell the clinician when Mirena was inserted and whether its threads feel different. Assessment may include an examination, pregnancy testing when relevant, and imaging of the uterus; some people need a sample from the uterine lining.

Do not remove the device yourself. Use a pad if you need to monitor flow, and bring a list of medicines, including hormone treatment or blood thinners. A [Hormonal IUD Device](/materials/hormonal-iud-device/) may be used for more than one reason, so the safest plan depends on why yours was fitted.

Seek urgent medical help for heavy bleeding, faintness, severe or one-sided pelvic pain, fever, or feeling suddenly very unwell. Prompt assessment is also needed if bleeding follows a long period without any bleeding, even when it is only spotting. Do not wait for a routine appointment if symptoms are worsening.

Ask whether the bleeding pattern could be related to Mirena, whether the device is correctly positioned, and whether you need an ultrasound or uterine-lining sample. Ask which symptoms should prompt same-day care and whether your treatment plan should change.