Burns are among the most serious and painful of all injuries.  The sources of this energy are heat, toxic chemicals, electricity, and ultraviolet and nuclear radiation.  Caring for a burn patient may present other problems: the scene may be hazardous, the fire or substance that caused the burn may have to be extinguished or removed, the patient may be experiencing shock or respiratory arrest caused by the burn, and may have sustained fractures from falling.  You must also be aware of and avoid energized wires, toxic fumes and smoke or the exposure to radioactivity that may have caused the burn.