Bleeding after sex, commonly referred to as “postcoital bleeding,” is something that impacts approximately nine percent of women (via The Obstetrician & Gynaecologist). There can be a number of things that can cause vaginal bleeding, according to the Cleveland Clinic. If you have a lack of estrogen or are menopausal, you could be suffering from vaginal atrophy or dryness. As a result, the friction of sex could cause bleeding. Additionally, you could suffer from an inflammation of the cervix, known as cervicitis. This condition, which can be caused by anything from bacterial vaginosis to chemical irritation from douches or condoms, can cause both bleeding and vaginal discharge.
You could also be suffering from cervical polyps, which can cause bleeding during and after intercourse (via Jo’s Cervical Cancer Trust). Polyps are fairly common and not always cause for concern. They can be caused by inflammation of the cervix, high levels of estrogen, or clogged blood vessels in the cervix. They are usually benign, but you can talk to your doctor about having them removed and possibly screened.