Plastic surgery caution: 1. Pregnant or menstruating. 2.Under 18 years old. 3.Infectious diseases or serious systemic diseases of the eye. 4.Allergic to local anesthetic. 5.Predicted unsatisfactory surgical results based on anatomical features. 6.Severe scar body, or abnormal coagulation mechanism. 7.Psychiatric or psychologically unsound or psychologically unstable persons. 8.Persons with high expectations, inadequate psychological preparation and unrealistic requirements for surgery.