As for scar treatment, non-invasive plastic surgery is the most commonly used and effective method at present. For small scars, they can be directly removed and then finely stitched. For those whose width is more than 3cm, it is difficult to suture directly, and local plastic surgery, skin flap transfer, skin tissue expansion or free skin grafting are needed. Local plastic surgery mainly adopts Z-shaped plastic surgery, which can achieve good results for contracture scar.