Bleeding after intercourse is dark red in color and can be caused by a variety of reasons. When there is an injury to the external genitalia, for example, if the vulva, including the vaginal wall, is stimulated by excessive force during intercourse, it can cause local mucosal edema and blood vessel rupture, which may cause a small amount of bleeding that usually ends within 3 days. The bleeding may be in the form of drops, which will heal automatically and will not be treated, except that intercourse will be prohibited in the next few days. When pelvic inflammatory disease occurs, the blood vessels in the pelvic cavity are stimulated to become congested, and the endometrium may also become congested. The stimulation during intercourse may cause a small amount of endometrial shedding, resulting in a small amount of bleeding, which usually ends within 3-7 days and does not affect the health of the body. Another reason is that when cervical erosion or cervical precancer occurs, it may also cause contact bleeding after intercourse. It is recommended to go to the hospital for TCT and HPV examination to rule out the possibility of precancerous lesions.