Frostbite is damage to skin and tissues from prolonged exposure to below-freezing temperatures. Frostbite severity is based on the depth of tissue injury. The most severe frostbite can lead to permanent damage and/or amputation.
The most common parts of the body to become frostbitten include your fingers, toes, ears, nose, chin, or cheeks.
Exposure to below-freezing temperatures can cause the body tissue to freeze. Ice crystals form within the frozen body part. Blood cannot flow through the frozen tissue. This causes the frozen tissue to be deprived of blood and oxygen. The combination of freezing and oxygen deprivation causes tissue damage or tissue death. Some tissue damage may also happen during warming.
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