Hello, thank you for your trust and support. Before mandibular angle plastic surgery, attention should be paid to: 1. Do not take drugs containing aspirin within two weeks before operation, because aspirin will reduce platelet coagulation function; 2. Patients with hypertension and diabetes should inform the doctor of their own condition in detail when visiting, so that the doctor can confirm the operation plan. 3. Make sure that you are in good health before the operation, and there is no infectious disease or other body inflammation; 4. No makeup before operation; 5. Women should avoid menstrual period, pregnancy and pregnancy; 6. Men should quit smoking one week in advance.