Frostbite is the freezing of both your skin and the tissue below it. Severe frostbite can result in permanent nerve damage and possibly gangrene - which is dead tissue that often turns black or green. If the frostbite is severe enough to kill the tissue, amputation may be the only solution to prevent the gangrene from spreading and to save your life. People with poor circulation because of diabetes, atherosclerosis, or other conditions have a higher risk of developing serious frostbite.
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