The second day of intercourse with blood in the leucorrhoea, excluding bleeding caused by a small amount of endometrial shedding before and after menstruation, is mainly considered to be related to factors such as intercourse stimulation, ovulatory bleeding, cervical lesions and gynecological inflammation. In this case, patients should go to hospital for further examination in combination with other symptoms to clarify the cause and then treat the problem. 1. Surface mucous membrane damage: If the action during intercourse is too hard, it may cause damage to the surface mucous membrane of the vagina and the surface mucous membrane of the cervix, which may lead to bleeding. If the patient has no other discomfort, it can be observed first and will be healed gradually. 2. Gynecological inflammation: such as vaginitis, cervicitis, cervicitis, etc., due to germs, vaginal and cervical congestion and contact stimulation by intercourse can cause bleeding. At this time, antibiotics and other drugs should be taken under the guidance of doctors for treatment; 3. Cervical lesions: cervical polyps, cervical fibroids, cervical high-grade intraepithelial lesions or cervical cancer are prone to contact bleeding, which is the manifestation of bleeding after intercourse, and require hospital screening related to cervical cancer, such as TCT and HPV testing; 4. Other: displacement of the intrauterine device can lead to bloody leukorrhea, which needs to be removed. Endometrial polyps, submucosal fibroids, endometrial cancer and other diseases can also trigger the symptom of brown leucorrhea after intercourse, and the cause needs to be clarified and targeted treatment should be taken.