Here postmenopausal coitus with blood in the semen flow should refer to postmenopausal coitus bleeding. Postmenopausal coital bleeding is not only a female problem, but can also be caused by male problems, such as cervical tumor, endometrial abnormality, seminal vesiculitis and other causes. 1. Cervical tumor: For example, if you have cervical cancer, the cervical cancerous tissues are in the cervix, causing the blood vessels to become brittle and exposed, and there may be contact bleeding when touching the cervix after intercourse, which is manifested as postmenopausal bleeding during intercourse, you have to go to the hospital to judge by liquid-based thin-layer cytology and cervical human papillomavirus test, and then consider surgery, radiotherapy and chemotherapy treatment according to the situation. 2. Endometrial abnormality: postmenopausal women with endometrial abnormality, blood flow from the uterine cavity, will also be manifested as bleeding after intercourse, it is necessary to understand the cause through hysteroscopy, and then targeted treatment. 3. Spermatitis: due to bacterial infection inside the seminal vesicles, inflammatory cells accumulate inside the seminal vesicles, and at the same time, there will be a large number of red blood cells, and postmenopausal women have intercourse, manifested as bleeding after intercourse. If you have a problem with the bleeding after menopause, you should go to the hospital to find out where the bleeding is, and then target the treatment.