Bleeding several days after sex: what to know

A delayed episode could coincide with a period or bleeding between periods. Contact-related bleeding more often appears during or soon after sex, although light blood may only be noticed later. Repeated, unexplained or postmenopausal bleeding should be checked.

Compare the episode with your usual cycle rather than assuming sex caused it. Hormone-related irregular bleeding, pregnancy-related bleeding and inflammation are among the considerations. Chlamydia can cause cervical inflammation that presents with bleeding between periods or after sex. Fragile vaginal tissue associated with genitourinary syndrome of menopause can present with discomfort and contact bleeding.

Changes affecting the cervix or vagina may present with abnormal bleeding. Cervical dysplasia, cervical cancer and vaginal cancer are possible explanations that require examination to distinguish from more common non-cancerous causes. The interval after sex cannot establish any diagnosis.

Write down the date of sex, when bleeding began, its duration and flow, and the dates of your last expected period. Add any pain during sex, pelvic cramps, vaginal dryness, unusual discharge, odour, urinary symptoms or missed contraception. Take a pregnancy test when conception is possible, following the test instructions on timing.

Arrange an appointment when the episode is unexplained, returns, persists or happens after menopause. A clinician may examine the vagina and cervix, offer infection and pregnancy tests, and review cervical screening. Ultrasound or referral may be considered according to the history and examination rather than the time gap alone.

Seek urgent medical care if the bleeding becomes heavy, you faint or feel markedly dizzy, or you develop severe abdominal or pelvic pain. Bleeding with fever, worsening pelvic pain or feeling acutely unwell also needs prompt evaluation. If pregnancy is possible, one-sided pain, shoulder-tip pain, weakness or collapse alongside bleeding are emergency warning signs.

Ask whether the timing suggests intermenstrual rather than contact bleeding, which infections should be tested for, and whether the cervix and vaginal tissue look healthy. Clarify whether you need pregnancy testing, cervical screening, imaging or follow-up if the first examination is normal but bleeding returns.