There are many kinds of scars left by operation, each symptom is different, and the elimination methods are different. Methods: 1. Hypertrophic scar. The skin color of surgical incision is purple or brown, slightly higher than normal skin, and there is slight itching. The formation time is within half a year. Applying heparin sodium gel or scar cream to the affected area for a period of time can make the scar fade away. If the scar appears for more than one year, it is invalid and needs to be removed by dermabrasion in the hospital. 2. Depressed scar is caused by subcutaneous tissue defect. If you want to eliminate it, you need to go to the beauty department of the hospital for subcutaneous fat filling surgery. 3. Patients with scar constitution will have keloids on their skin after operation. Hormone drugs, such as prednisone hydrochloride injection or triamcinolone acetonide injection, can be directly injected into keloid for local blocking treatment, or taken out in hospital by laser, freezing, local radiation and surgical resection.