Patients with wound crusting accompanied by purulence, generally speaking, according to the different severity of purulent infection, different treatment methods can be taken: a. If the extent of purulence at the wound crusting is small, no large amount of pus is found through ultrasound examination. At this time, the local inflammatory infection of the patient is mild, and vital iodine gauze or Ruyi Jinhuang cream can be used to apply local wet compresses for 3-5 days. At the same time, oral amoxicillin is taken to strengthen anti-infection treatment. Most patients local pus accumulation and inflammation can be absorbed by themselves and no serious infection will occur. Second, if the patient’s wound crust infection is more serious, through the ultrasound examination found under the scab with a large amount of pus accumulation. The patient has clinical symptoms such as increased local skin temperature and pain, at this time, it is necessary to remove the crust from the wound as soon as possible. The lower part of the incision was thoroughly opened and drained, necrotic tissue was removed from the wound, and wound dressing was intensively changed. At the same time, combined with infrared local physical therapy, in order to promote faster healing of the wound.