Bleeding from intercourse after clean menstruation can be seen in the following cases: First, menstrual blood discharged from the uterine cavity. If a woman has bleeding from intercourse just after her menstruation, and there is no bleeding from intercourse in the usual situation, it is considered normal for the menstrual blood stored in the uterine cavity to be discharged, and no treatment is needed. When a woman is about to finish her menstruation, the exfoliated endometrium is very little and the bleeding is also very little. The stimulation of the uterus at this time is very little, so the contraction of the uterus is weakened and the blood and a small amount of exfoliated endometrium will be in the uterine cavity, and the stimulation of the patient’s intercourse will cause the uterine contraction to strengthen, and at the same time, under the effect of the impact of intercourse, the accumulated blood will be discharged, so the patient will have bleeding, and the bleeding in this case is very little and the patient has no discomfort. Second, consider the possibility that the patient has cervical lesions, which is the most common cause of intercourse bleeding, such as inflammatory polyps, epithelial neoplasia or cervical cancer of the cervix, which requires cervical screening; third, other conditions, such as ovulatory bleeding, pelvic inflammatory disease, gynecological oncological diseases, etc., which need to be investigated in combination with other clinical symptoms and signs of the patient.