Postpartum coitus bleeding is mainly due to the vaginal mucosa and the cervical mucosa has not yet fully recovered to normal, due to the friction of sexual life, resulting in local mucosal breakage and cause bleeding. In this case, there are the following suggestions: 1, do not have sex again; 2, oral anti-inflammatory drugs to prevent infection; 3, at the same time given to stop bleeding medicine for treatment. If the vaginal bleeding still does not stop three days after the above treatment, it is recommended to go to the hospital for examination to rule out bleeding caused by intrauterine residue or poor uterine recuperation. It is recommended to have sex after 56 days after delivery for normal births and three months after delivery for cesarean deliveries.