First-degree burns generally injure the epidermis, local skin redness, may have a slight erythematous plaque, does not affect limb activity and functional impairment, will not leave scars. Early must be quickly cold water rinse or ice water immersion for more than half an hour, can play a pain relief, reduce local tissue swelling and inflammatory exudation. After cold water treatment dry the trauma surface, and apply it externally with petroleum jelly or moist burn cream. Expose the area to air, avoid squeezing, and move the limb and the burned area appropriately. Observe the wound regularly and apply medication.