Whether the scald heals and leaves a scar is mainly related to the depth of the scald, small area shallow scald in time to clear and protect the wound, can be self-healing and few scars. Scalding is thermal burns, burn depth is generally divided into I degree, shallow II degree, deep II degree, III degree. Generally, I degree and shallow II degree burns are superficial burns, and deep II degree and III degree burns are deep burns. 1. First-degree burns: only the superficial layer of the epidermis is injured, the surface is erythematous and dry, with a burning sensation. Generally, it is healed in 3-7 days, and there may be pigmentation in the short term, and most of them can subside on their own. 2. Superficial Ⅱ degree burns: injuring the epidermal hair layer and dermal papillary layer. Obviously localized redness and swelling, containing yellowish clarified liquid, large blisters of different sizes, after removing the blister skin, the wound is red, moist, with obvious pain. 2 weeks or so, the wound can be healed, usually with hyperpigmentation, without scarring. 3. deep Ⅱ degree burns: injury to the dermis below the papillary layer, there can be intensive small blisters, after the blister skin, the wound is red and white, pain dull. If there is no infection, it will take 3 to 4 weeks to complete the repair, often with scarring. 4.Ⅲ degree burns: the injury to the whole layer of the skin, can be deep to the muscle or even bone marrow, internal organs. The wound surface is white or yellowish, even hard as leather, dry, no ooze, cool and painless. Usually the crust falls off after 3 to 4 weeks. Most heal with scarring and often cause deformities. Small shallow burns in time to clear, protect the wound, most can heal on their own and few scars. Large area deep burns generally after rehydration therapy, excision of burned tissue, skin grafting and other treatments, can not avoid scarring, keloid deformity, etc., should pay attention to the later rehabilitation treatment. Therefore, burns should be timely to the regular hospital, standardized treatment, so as not to delay the condition to increase the chances of scar formation.