The following reasons are common in clinical practice: 1. When menstruation is approaching, the pelvic cavity is already in a congested state, and the cervical and vaginal mucosa will also be in a congested state, which can cause vaginal bleeding due to damage to the local mucosa when having intercourse. 2. Because menstruation is approaching, the stimulation of intercourse can also lead to changes in the hormone level in the body, resulting in early menstruation, so it may seem 3. lesions of the cervix itself and redundant vaginal mucosa cause bleeding during intercourse. it is recommended to have a detailed gynecological examination to understand whether there are redundant vaginal cervix; it is recommended to have a cervical cancer screening and give treatment according to the clinical results.