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 in detail when they are first diagnosed, 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. Don't make up before the operation;

5. Women should avoid menstrual period.