Frostbite is the most common injury resulting from exposure to severe cold.
Superficial frostbite is characterized by grey or yellowish patches on the affected areas.
The skin remains soft and pliable, but becomes red and flaky after thawing. Treat superficial frostbite by taking the victim inside immediately and warming the affected areas with warm, not hot, water. Deep frostbite usually affects the feet or hands and is characterized by waxy, pale, solid skin which may turn blue or purple upon thawing. Large blisters may also appear. Treat deep frostbite by moving the victim indoors and seeking medical attention immediately.