In the process of labor and delivery most pregnant women will have a vulvar tear, the tear although there is the possibility of self-healing, but if self-healing, the wound recovery is not particularly good, and will increase the infection as well as the vaginal opening of the flaccid situation. So for postpartum perineal tear, need to rule suture, if in the regular hospital to give birth to a baby, perineal laceration after midwife or doctor will be in accordance with the anatomical level, the perineal wound layer by layer suture, as long as the suture is good, the vast majority of mothers in the postpartum perineal recovery is relatively good, and is not prone to infections, so there is a laceration must be stitched up. In some cases, the perineal tear is caused by trauma, in which case it is even more important to close it properly, otherwise the risk of infection will increase.