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Frostbite is the freezing of body tissues of skin, muscles and bones in extreme cold. Blood vessels close to the skin start to narrow or constrict. This helps to preserve your body temperature. In extreme cold or when the body is exposed to cold for long periods, this protective strategy can reduce blood flow in some areas of your body to dangerously low levels. The combination of cold temperature and poor blood flow can cause tissue injury. Frostbite is most likely to happen in body parts farthest from the heart, and those with a lot of surface area exposed to cold. These areas include the toes, fingers, ears and nose. It makes it worse by warming the areas up because that can cause blistering. Normally it results in amputation.
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