Wound exudate is not necessarily infection, in the early post-operative period, if the wound exudate is clear, visible a little oil droplet-like exudate, more consider fat liquefaction caused by the local wound without redness, swelling and heat pain performance, in this case can actively carry out wound incision, open wound gauze drainage can be. If the wound infection appears in the 3-5 days after the injury, the wound generally has local redness, swelling, heat and pain, and at the same time there is an increase in body temperature and fever, chills, this situation should be actively given to remove the sutures, open the wound, local disinfection with hydrogen peroxide, local gauze external dressing, to achieve the purpose of drainage, this is the treatment of postoperative infection.