Bleeding after sex
Another term for this is post-coital bleeding, and it usually occurs within 24 hours of intercourse. In most cases it is nothing to worry about, but should be investigated if persistent or if you are concerned.
Common causes are cervical polyps and cervical ectropion. A polyp is a benign (not cancer) growth at the opening of the cervix. An ectropion is a raw area on the outside of the cervix that can become friable, or in other words fragile. An infection (such as chlamydia or gonorrhoea) may also cause this.
An uncommon cause of post-coital bleeding is cervical cancer. Even if a recent cervical smear is normal, persistent postcoital bleeding should be investigated. A colposcopy may be indicated.
What to do
Please see your GP if you have persistent or concerning post-coital bleeding.