If there is occasional bleeding during intercourse, the patient needs to pay attention to it. This is because the causes of this phenomenon are not only menstrual blood and vaginal laceration, but also cervical lesions, such as cervical inflammation, cervical intraepithelial neoplasia, cervical cancer and other diseases, which cannot be ignored and need to be promptly checked and treated by the gynecology department of a regular tertiary hospital. The causes of occasional bleeding during intercourse are as follows: 1, menstrual blood: some women have sex at the end of their menstruation, during which a small amount of bleeding or coffee-colored discharge can occur. 2. Vaginal laceration: during sexual intercourse, if the posture is improper, the position is not correct or the force is too hard, it may cause vaginal injury and bleeding, in this case, it is usually not important to avoid the above triggering factors; 3. Cervical lesions: including cervical inflammation, cervical intraepithelial neoplasia and cervical cancer, in this case, occasional bleeding during intercourse is relatively important. It is important to go to the gynecological department of a regular hospital in time for a gynecological examination to clarify whether there is inflammation of the vulva, cervical redundancy or erosion, and the pelvic situation. If cervical lesions cannot be ruled out through gynecological examination, cervical cancer screening, colposcopy and cervical biopsy should be performed if necessary. As mentioned above, patients cannot determine the cause of occasional bleeding during intercourse on their own, so they should pay attention to it and seek medical examination in time to clarify the cause of the disease, so as to provide targeted treatment and avoid the risk in time.