Generally speaking, as long as the wound is deeper than the skin of the mucous layer, it will leave a scar if it is more than one centimeter long. The problem of modern plastic surgery research is how to reduce scar formation or make scar inconspicuous. In order to make the wound heal as soon as possible and minimize the scar, the surgeon should pay attention to it from the time of debridement and suture in the emergency room. Debridement surgery is to thoroughly clean the wound and remove inanimate tissue. The doctor will sew the wound together according to the specific situation and strive for the wound to heal together. Only one wound heals together, and the scar will be the lightest and least obvious. Once the wound is infected and suppurated, there will inevitably be more connective tissue proliferation to fill the wound defect, and the scar left will naturally be obvious. In large hospitals in the United States, wounds in important parts such as face and hands, or wounds with excessive tissue defects, are generally handled and stitched by plastic surgeons. They are experts in this field. If the wound healing is not ideal and the scar is dazzling, you can ask the plastic surgeon to remove the scar and redo it after half a year. People with scar constitution can receive radiotherapy after a week of wound healing to inhibit scar hyperplasia. Wounds in limbs can also be compressed with elastic bandages to reduce scar formation. Early after facial wound healing, local injection of adrenocortical hormone can also inhibit scar formation. Scars on hands and other joints should be rehabilitated under the guidance of physiotherapists, which can also soften scars and avoid joint stiffness. In short, if you have concerns, you should consult your doctor. Early treatment is the best way.