Fresh blood during intercourse is not normal, because normally there is no blood after intercourse. Fresh blood after intercourse may be caused by damage to the vaginal wall, or damage to the cervix, or cervical polyps, or inflammation of the cervix, or precancerous lesions of the cervix or cervical cancer. Therefore, it is important to go to the hospital as soon as possible for examination. If polyps are seen on the cervix, they may be caused by polyps; if trauma is seen on the vaginal wall or the cervix, it may be caused by injuries during sexual intercourse. At the same time, pre-cancer screening of the cervix should be done, and the next step of treatment should be determined according to the results of the pre-cancer screening, and colposcopy is needed if pre-cancerous lesions of the cervix are present.