There are many methods of scar repair, and the common ones are as follows: 1. Grinding operations: including traditional grinding and microcrystalline grinding. Simply put, it is to smooth the uneven scars and let the local skin grow more evenly. This operation is suitable for tiny scars with many depressions, but if grinding operation is used to treat scars with large lumps, the new skin that grows again is still scar tissue, which cannot improve the problem. 2. Radiotherapy: X-ray shallow irradiation or isotope application can be used. It has a good curative effect on keloid. 3, skin and soft tissue expansion: suitable for a wide range of scars, because it can not be directly sutured after resection, it must be covered with nearby or distant tissues. This method has a good effect on eliminating large area scars or functional scars. 4, steroid hormone scar injection: suitable for small and medium-sized hypertrophic scars and postoperative strip hyperplasia. 5, local drug application: the use of scar softening cream, scar enemy and other applications can promote scar softening and absorption.