You need to register at the hospital for dressing change treatment. You can register for emergency surgery or general surgery, and some hospitals with wound centers need to register for the wound center. Dressing change is a treatment to keep the wound in the operation area clean and to avoid wound infection. If the wound is not significantly red, swollen or painful, a change of medication every 3 days or so is sufficient. If the wound is significantly red and swollen or oozes a lot, it needs to be changed every day or so. If a drainage strip is placed in the wound, the frequency of dressing changes needs to be increased. If the wound dressing is soaking wet, it needs to be changed, possibly 1-2 times a day. At the same time of changing the dressing, you need to take antibacterial drugs to prevent wound infection, you can choose cephalosporins and other drugs for treatment. But need to pay attention to, on the one hand, make if they have a history of cephalosporin allergy can not take, can be changed to erythromycin and other treatment; on the other hand, during taking anti-inflammatory drugs can not drink alcohol, to avoid disulfiram-like reaction, etc..