In recent years, the number of burn patients has gradually increased, and people are gradually concerned about the burn condition. When encountering patients with chemical mild burns for the examination of burns, the doctor first determines the injury according to the depth of the patient’s burns, and then carries out the corresponding treatment. There is a history of being burned, the skin at the injured place is red and painful, with obvious tenderness, oozing or blistering. Light pressure localized skin whitening. Severe burns blood routine examination of red blood cell count, hemoglobin volume and erythrocyte pressure volume increased significantly, urine specific gravity increased; metabolic acidosis, carbon dioxide binding capacity decreased, non-protein nitrogen increased, when possible, can be checked for blood gas analysis, as well as serum Na +, K +, CI – determination, to determine whether there is acidosis. No laboratory tests are required for mild burns.