Clinical patients wound sterile gauze dressings how often to change based on the specific circumstances of the patient’s wound to objectively analyze the following: First, for Class I surgical incision, the patient’s wound generally does not appear obvious fat liquefaction or infection, then the patient can be 2-3 days to change the incision dressings, the incision will not be long because of the lack of replacement of dressings caused by the delay in the healing process. Second, for infected incision, if the wound is accompanied by more purulent exudate and secretion, the principle of replacing wound dressings is to change on demand, that is, the patient’s wound exudate completely wet dressings and dressings can be replaced after the dressings, and sometimes a day can be changed 3-5 times, as far as possible, to the patient’s wound to create a relatively clean, moist environment, in order to promote the proliferation of local granulation tissue, conducive to the faster healing of infected wounds. Faster healing of infected wounds.