How long it takes for a postpartum laceration to heal is related to the size and depth of the laceration and whether it is co-infected, and there are large individual differences that cannot be generalized. Usually, if the postpartum lacerations are small and shallow, they can heal in about 7 days; however, if the wounds are deep or multiple, it may take about 10-14 days. Because of more vaginal secretions, vulva is relatively easy to be moist, easy to breed bacteria, once caused by infection, the healing time will be relatively longer, need to wait for the infection control before the wound will gradually heal. In addition, the vulva is rich in blood supply, so if the vulva is injured after receiving adequate nutrition, the wound will heal more easily. After the postpartum vulva tear must pay attention to keep the vulva clean and dry, avoid water, so as to avoid secondary infection, in the basic healing of the wound can use potassium permanganate solution sitz bath, can play a disinfection, sterilization effect, but also to avoid premature intercourse.