Annual Probability of Frostbite

Cold-related injuries, including frostbite and hypothermia, affect an estimated 250,000 Americans each year, with approximately 1,300 deaths from hypothermia annually. Frostbite specifically occurs when skin and underlying tissues freeze, typically affecting fingers, toes, nose, ears, cheeks, and chin.

Frostbite can occur in as little as 30 minutes when wind chill temperatures drop below -18 degrees F (-28 degrees C), and within 5-10 minutes at extreme wind chills. The severity ranges from superficial (frostnip, affecting only the skin surface with no permanent damage) to deep frostbite (affecting skin, tissue, muscle, and bone, potentially requiring amputation). About 10% of severe frostbite cases result in amputation.

Risk factors include inadequate clothing, alcohol consumption (which causes vasodilation and impaired judgment), smoking, diabetes, peripheral vascular disease, and certain medications. Outdoor workers, the homeless, and winter recreationists face the highest risk. Treatment involves rapid rewarming in water at 98-102 degrees F, pain management, and prevention of refreezing (which causes worse damage than the initial freeze). Modern treatment with iloprost and tPA for severe cases has reduced amputation rates by about 50%.