1. Patients are required to be hospitalized for 3-5 days after mandibular angle surgery. 2. Don't wash your hair within one week after mandibular angle surgery. 3. After mandibular angle surgery, the hood should be pressure-bound for 5 ~ 7 days. If there are no special circumstances, it is not advisable to disassemble it halfway. If it is disassembled, it should be bandaged in time. Pay attention to check for broken skin. If a drainage strip is placed in an oral wound, it should be taken out 48 hours after the operation. 4. It is forbidden to take any kind of supplements and drugs that may accelerate blood circulation, reduce blood coagulation mechanism and affect wound healing, such as ginseng, aspirin, blood-activating drugs, diet pills, menstruation-regulating drugs, etc. Please consult a surgeon if necessary. 5. Eat liquid food from the fifth day after mandibular angle surgery, and try to avoid biting hard objects within three months; 6. 6 hours after the mandibular angle operation, start gargling with mouthwash until the stitches are removed; 7, mandibular angle surgery within three months shall not do facial beauty massage, shall not rub the surgical site. 8. Take out stitches 7 days after mandibular angle surgery, eat less spicy food and try to eat semi-liquid food. 9. Smoking is not allowed after mandibular angle surgery.