Bleeding after intercourse is bright red and painless. It is possible that the intercourse caused damage to the vagina or to the cervix. Because the upper third of the vagina and the cervix have few nerves, even if there is an injury, the pain is usually very mild and some people do not feel any pain. In some cases, the pain may not be felt. In other cases, it may be a cervical polyp, a precancerous lesion of the cervix or an inflammatory disease of the cervix, which may cause bright red bleeding if you have intercourse. Therefore, it is necessary to go to the hospital for examination and if the bleeding is heavy, it is necessary to perform hemostatic treatment. If the damage is caused by sexual intercourse, the damage may be serious and sometimes there may be laceration of the vaginal wall, which needs to be stitched up; if it is caused by cervical polyp, it is caused by cervical polyp, and pre-cancerous screening of the cervix should be done, and the next step of treatment should be determined according to the result of the screening; if there is inflammation, anti-inflammatory drugs can be applied.