Attention should be paid to: 1 after mandibular angle plastic surgery, the suture should be removed 7 days after surgery, and hospitalization should be 7 days if possible, and at least 2-3 days if time or conditions do not permit. 2. Because surgery is an oral route, in order to prevent postoperative infection, we should fast within 2 days after surgery and rely on infusion to reduce postoperative infection rate. 3. Due to the trauma caused by surgery, the soft tissue swelling is most obvious 3-4 days after operation, and then the soft tissue swelling will obviously subside. By the seventh day of suture removal, the main edema basically subsided, but there were still some slight soft tissue swelling, which generally did not affect study and work. 4. Slight swelling subsides slowly, which usually takes about one month, and it may take 3-6 months to fully achieve the best effect, which will not affect normal life and work.