Q: What causes bleeding after sex?

There are many causes for bleeding after sex, the majority of which are benign (non-cancerous). It can be due to infection with chlamydia (a sexually transmitted infection), polyps (these are like skin tags) or injury. However, it is also an early warning sign for cancer of the cervix. You must see your doctor immediately if you develop this symptom, even if you have had a recent normal smear test. The doctor will examine the cervix with a strong magnifying device called a colposcope and will tell if other tests are needed.

-- Miss Adeola Olaitan, Consultant Gynaecologist, University College Hospital, London