Scalding is the body injury caused by the body contacting objects with excessive temperature, including solid, liquid, gas, etc.. Whether the scars will remain after the burns on the corners of the mouth need to be decided according to the size and depth of the local burns. 1.Generally will not leave scars: If the burns are shallow, small area, about 1mm, and shallow depth, such as 1-2mm, at this time there may be redness, swelling, heat, pain, and accompanied by blistering, breaking, redness of the wound, etc., but if there is no infection and the wound heals normally If the area of the scald is very large and deep, such as the area has reached the size of 1cm in diameter, the depth of more than 2-3mm, may have injured the dermis, at this time can be manifested as more sluggish pain, may or may not have blisters, basal pale, healing slower, if improper care may be secondary to infection, most will leave scars with pigmentation. The scald should be cleared promptly with saline and disinfected with iodophor to minimize the tissue damage caused by the scald and to avoid infection. If the wound is very painful and large, you should go to the hospital and under the guidance of a doctor, perform the appropriate treatment, such as skin grafting surgery.