When the symptoms of bleeding after intercourse appear, you should visit a hospital and have an internal gynecological examination to clarify whether the bleeding site is from the uterine cavity, the cervix, or the vagina. Bleeding after intercourse may be related to the following reasons: 1. Endometritis and pelvic inflammatory disease may cause bleeding after intercourse. Thickening of the endometrium is a contraction stimulated by intercourse, which may also lead to vaginal bleeding. Intercourse stimulation when suffering from vaginitis may lead to bleeding from the vaginal wall. 2. Suffering from cervical erosion or cervical polyps, bleeding after intercourse can occur. Cervical fibroids prolapsing into the cervical opening may also lead to bleeding during intercourse; 3. Contact bleeding occurs in the case of cervical cancer, and if the lesion is large, heavy vaginal bleeding may occur. When related symptoms occur, patients can also do pelvic ultrasound examination and cervical cancer screening along with internal gynecological examination to clarify the cause and treat the symptoms.