Post-coital bleeding with Mirena: what to know

Mirena is a hormonal intrauterine system. Light, irregular bleeding can occur, particularly while the body is adjusting after insertion, but bleeding specifically after intercourse may also come from the vagina or cervix rather than the uterus. The pattern, timing, pain, discharge, and possibility of pregnancy help guide the evaluation.

Friction or dryness can irritate delicate vaginal or cervical tissue and leave a small amount of blood. Cervical ectropion, inflammation, sexually transmitted infection, or a cervical polyp can also cause contact bleeding. A hormonal change, a device that has shifted, or pregnancy may need to be considered. A pregnancy with an intrauterine device needs prompt medical review because pain or bleeding can signal a pregnancy outside the uterus.

The bleeding itself does not identify one cause. A clinician may ask when Mirena was inserted, whether the bleeding follows every sexual encounter, whether the threads feel different, and whether you have pain, unusual discharge, fever, or missed periods. Examination and testing can distinguish cervical, vaginal, uterine, infection-related, and pregnancy-related causes.

Make a routine appointment if the bleeding is new, keeps returning, or is accompanied by pain, unusual discharge, or bleeding between periods. Record when it happens, how long it lasts, and any relation to Mirena insertion or your menstrual cycle. Use lubrication if dryness or friction may be contributing, and avoid inserting anything into the vagina if it worsens pain or bleeding.

A healthcare professional may check the device position, examine the cervix and vagina, offer infection testing, and perform a pregnancy test when appropriate. Do not remove Mirena yourself. If the threads cannot be felt or feel markedly longer or shorter, arrange a check and use another contraceptive method until you receive advice.

Seek urgent medical help for heavy or rapidly increasing bleeding, severe or one-sided lower abdominal pain, fainting, marked dizziness, fever, or feeling very unwell. Get prompt advice if you have a positive pregnancy test, think you may be pregnant, or have new severe pain with bleeding. These features need assessment for complications such as infection, device displacement, or an ectopic pregnancy.

If symptoms are mild but recurring, do not wait for them to become severe before arranging an appointment. Bring the date of insertion, your bleeding pattern, medicines, and any pregnancy or infection concerns to the consultation.

Ask: Could the bleeding be coming from my cervix or vagina? Is Mirena in the expected position? Do I need a pregnancy test or infection testing? Which symptoms should make me seek urgent help? If the bleeding continues, what other causes should we investigate?