Burns are injuries to body tissues caused by heat, chemicals or radiation.
Scalds are caused by wet heat, such as steam or hot liquids. Intermediate burns form blisters, can become infected, and need medical aid. Deep burns involve all layers of the skin, which may be pale and charred, may be pain free if nerves are damaged, and will always require medical attention. Lay the casualty down and make him as comfortable as possible, protecting burn area from ground contact. Gently remove any rings, watches, belts or constricting clothing from the injured area before it begins to swell.