A small amount of bleeding after menstruation may be related to the following reasons: 1. Intercourse during menstruation, when menstruation is not over, premature sexual intercourse will stimulate the tiny blood vessels in the endometrium to open again and the pelvic cavity to become congested, resulting in a small amount of blood still flowing out after menstruation. 2. Luteal atrophy insufficiency, if luteal atrophy insufficiency will occur, the menstrual period will be prolonged and vaginal dripping bleeding will still occur after menstruation ends, the bleeding volume is not large 3.Gasmic diseases of reproductive organs, such as cervical polyps, cervicitis, cervical cancer, endometrial polyps will show symptoms of bleeding even after menstruation. 4.Miscarriage, which may be treated as menstruation, is relatively long and not easy to stop bleeding. If there is still a small amount of blood flowing after menstruation, go to the hospital for examination and do the corresponding treatment according to the result of the examination.