Normal blood supply in scar area is the key to the success of scar hair transplantation. This is a necessary condition for scar implantation, and secondly, the doctor's skill is also very important during the operation. Accurate extraction, separation and implantation can ensure the survival rate of hair follicles. Postoperative maintenance is an essential link. Correct and professional postoperative maintenance can ensure the survival rate of hair follicles after hair transplantation and promote hair growth.