Double eyelid surgery should be cautious about scar constitution. Do not take drugs containing aspirin for two weeks before double eyelid surgery, because aspirin will reduce the function of platelet coagulation; Patients with hypertension and diabetes should inform the doctor of their condition at the time of initial diagnosis, so that the doctor can confirm the operation plan; Make sure that you are in good health before the operation, and there is no infectious disease or other body inflammation; Women should avoid the menstrual period and get pregnant.