After intercourse, if the vaginal bleeding does not stop, the following problems should be ruled out. First, there is a local problem with the cervix, such as a local polyp or early stage of cervical cancer, which can occur and promptly go to the hospital for examination. If it is a polyp and the bleeding does not stop, the polyp can be removed. If cervical cancer is suspected, cervical cancer screening will be done as early as possible and the appropriate treatment will be given according to the results. Secondly, there is a possibility of pregnancy. After intercourse, the contraction of the uterus causes detachment between the vaginal wall and the gestational sac, so there will be more than one bleeding. It is recommended to go to the hospital as soon as possible to rule out the possibility of pregnancy, and if necessary, to do ultrasound examination, and according to the results, to do the corresponding treatment clinically.