Bleeding during intercourse due to excessive force is caused by the genitals stimulating the blood vessels of the cervix, including those of the vaginal wall, during intercourse. In some cases, women who have just had intercourse are too tight, and the vagina can be stimulated by force during intercourse, causing bleeding. It is important to observe the time and amount of bleeding, as long as the amount of bleeding is relatively small, similar to the first day of menstruation or near the end, it will be over in 3-7 days and will not affect your health. If the bleeding is the same as the usual amount of menstruation and continues to increase, go to the hospital for a colposcopy to rule out the existence of a rupture of the posterior vaginal wall, causing bleeding caused by a ruptured blood vessel, which should be stitched up.