Scars usually require surgery. The specific amount of China's money is related to the size of the scar and the surgical method used. We need to know the types of scars before we can use the corresponding methods to repair them. Scars are generally divided into primary scars and secondary scars. Most of the primary scars begin in the chest or shoulder and back. little red dot's itching changes from small to large, from soft to hard, and the red or dark red is like a round ribbon butterfly. Secondary scar is also called hypertrophic scar. Burn, surgical trauma, acne infection, edema, foreign body stimulation and other factors damage the dermis, leading to transitional hyperplasia of subcutaneous connective tissue. There are obvious capillaries extending outward. Any injury that goes deep into the dermis can form scars, but the appearance of scars is different in different parts of the same body. Laser scar removal surgery is a good method to treat scars at present, which has the advantages of less pain, less damage and good effect. By changing the focusing characteristics of laser, the laser spot becomes a spot, and then the spot is scanned by a pattern generator according to a certain pattern, so that the high heat generated by the laser spot instantly removes the target tissue in the scanning range, and the effect of laser scar removal is very good.