Frostbite is a severe burn caused by exposure to cold. Physiologically it is the “freezing” of the skin and its underlying tissues. It most often affects mountaineers and people exposed to the direct action of cold that freezes the skin and the tissues under the skin. Under freezing temperatures (below 0.55 °C (31 °F)), the body tries to throttle the heat dissipation to the outside and directs the blood increasingly to the internal organs ...