Bleeding after masturbation can be caused by a number of reasons. First, when there is masturbation, due to the fingers into the vagina, the vagina will scrape the vaginal wall, including the cervix, it will cause the chance of bleeding occurs. Second, when masturbation, because of the excitement of the uterine lining, it will cause a certain small amount of bleeding occurs. It is advisable to follow up and observe if it happens once in a while. Third, the bleeding after masturbation will still have a certain relationship with the body’s hormone levels, there will be endocrine hormone diseases, such as prolactinemia or polycystic ovaries, this time is more likely to cause bleeding after masturbation. If it occurs frequently, we should go to the hospital and register with the gynecology department for colposcopy examination to rule out the existence of cervical erosion, the existence of Nascent cysts, there is no hypertrophy, because when there is the existence of these diseases, there will be bleeding after masturbation. At the same time, ultrasound should also be carried out to determine whether there is any abnormality of the uterus and the double adnexa.