Hair will not grow in hair scars, because the hair follicle units in scars have been damaged or necrotic, and hair follicles are non-renewable. Once damaged or necrotic, hair will not grow back. At present, the common method to make scars grow hair is scar planting. Through scar implantation, healthy hair follicles are transplanted to scars and hair grows on scars, with good results. The face plastic surgeon in Changsha was originally a public tertiary and secondary hospital. Later, a facial plastic surgeon was established in conjunction with the Hong Kong Institute of Facial Plastic Surgery. The landlord can go to the hospital for examination and consultation.