Bleeding after intercourse may be caused by rough sex or gynecological diseases. 1. rough sex: even if it’s not the first time you have sex, it’s often due to sexual position, strength and other factors that lead to vaginal mucosa or skin damage and cause bleeding. 2. Gynecological diseases: Commonly, there are mainly cervical inflammation, pre-cancerous lesions of the cervix, cervical cancer and so on, which can cause contact bleeding. There may also be uterine bleeding, including uterine inflammation, the effect of intrauterine device, endometriosis, endocrine disorders and so on. In short, any non-menstrual bleeding symptoms need to do a routine gynecological examination as soon as possible to clarify the cause of bleeding as soon as possible, in order to do the corresponding treatment to avoid delaying the condition.