If there is bleeding during sex one month after miscarriage, it is possible that the uterus has not fully recovered to normal or there is residual tissue in the uterine cavity causing bleeding, which needs to be determined by ultrasound examination of the uterine cavity at the hospital. If the uterus is not contracting properly and the uterus has not returned to normal, you can take oral motherwort pellets or biochemical pellets or intramuscular injection of uterine contraction to help the uterus contract, which will help stop the bleeding and help the uterus return to normal. If there are residual tissues in the uterine cavity, if necessary, a second operation is needed to remove the tissues before the bleeding can be stopped. Of course, we cannot rule out bleeding caused by contusions of the vaginal wall or the cervix due to strenuous sexual intercourse, and a gynecological examination is needed to clarify the diagnosis. If it is determined to be a cervical contusion or a contusion of the vaginal wall, if the wound is large, surgical stitches will be needed to stop the bleeding, if the wound is small, gauze can be inserted into the vagina to stop the bleeding.