Blisters after burns are formed by exuded tissue fluid. When a burn occurs, the local capillaries or cells of the dermis are damaged, and tissue fluid exudes and accumulates below the epidermis, forming blisters. Scalding is the damage caused by liquid or steam to the tissues, can be divided into four degrees, only shallow second degree, deep second degree burns will blister. Superficial second-degree scald injury to the superficial dermis, resulting in increased capillary permeability tissue fluid leakage, the epidermis will appear in different sizes of blisters, blisters after removing the skin redness of the wound, pain is obvious. Deep second-degree scalded blisters and shallow second-degree scalded principle is the same, but the emergence of small blisters, remove the blister skin after the trauma of red and white, feeling numb. After the occurrence of burns should be timely to the hospital, under the guidance of the doctor symptomatic treatment, to avoid the occurrence of infection and other adverse effects.