1.Excisional direct suture: simple method, little damage, only applicable to narrower and smaller scars. 2, skin slice graft: cut own skin slice, used to repair larger scar after excision. Due to the thinness of the skin, the skin surface may be dry, fragile, inelastic, not resistant to pressure, easily broken, darkened, and wrinkled after survival. 3. Flap transplantation: A flap is a piece of skin and subcutaneous tissue with blood supply from the body, which is cut from one part of the body and transplanted to another part. It can be used for the repair of deep scar excision with exposed bone, joint, tendon, large blood vessel, nerve or unstable scar near the bone surface, depressed scar and scar excision in areas with special requirements such as needing good sensation and wear-resistant pressure. The disadvantage is that the surgery is more traumatic. 4.Abrasion. 5. Application of tissue expander and microsurgery techniques.