Generally speaking, the dressing is changed about 2 days after the stitches, which is commonly referred to as a dressing change. The purpose of dressing change is not to spread medicine on the wound, the purpose is to observe whether there is bacterial infection or inflammation in the wound. If there is redness, swelling and hard nodules indicate that the wound is infected, it is necessary to promptly use antibiotics or change the type of antibiotics; if there is a positive fluctuating sensation, it is necessary to promptly remove the sutures and squeeze out the purulent secretions. In addition the said postoperative stitches after about 2 days change is the general situation, if there is incision dressing or gauze because of wound secretion of blood or exudate lead to gauze become damp, need to promptly change the dressing. Because wet gauze, not only can not play a role in stopping bacterial infection, but also accelerate the growth and reproduction of bacteria, so after stitches usually in about 2 days to change the dressing, but if there is gauze becomes damp need to change the dressing in a timely manner.