When skin and underlying tissues freeze after being exposed to very cold temperatures.
The areas most likely to be affected are the fingertips, toes, earlobes, cheeks, chin and tip of the nose.
Signs/Symptoms:
Cold skin with a prickly feeling
Numbness
Skin that looks red, white, bluish-white, grayish-yellow, purplish, brown or ashen
Hard or waxy-looking skin
Clumsiness due to joint and muscle stiffness
Blistering after rewarming (severe cases)
3 Stages of Frostbite:
Step 1: Frostnip
A mild form of frostbite
Continued coldness leads to numbness in affected areas
As your skin warms, you may feel pain or tingling
Does not cause permanent damage
Step 2: Superficial Frostbite
Slight changes in skin color
Skin may begin to feel warm - a sign of serious skin involvement
As your skin warms, you may feel stinging, burning, and swelling
Fluid-filled blister(s) may appear 12 to 36 hours after rewarming the skin
Step 3: Deep (Severe) Frostbite
Skin turns white or blue-gray
Loss of all sensation of cold, pain, or discomfort in the area
Joints or muscles may stop working
Large blisters form 24 to 48 hours after rewarming
The tissue turns black and hard as it dies
Plan of Action:
You can treat mild frostbite (frostnip) yourself. All other frostbite requires medical attention. First-aid steps for frostbite are as follows:
Check for hypothermia. Get emergency medical help if you suspect hypothermia. Signs of hypothermia include intense shivering, drowsiness, confusion, fumbling hands and slurred speech.
Protect your skin from further damage. If there's any chance the affected areas will freeze again, don't thaw them. If they're already thawed, wrap them up so that they don't refreeze.
If you're outside, warm frostbitten hands by tucking them into your armpits. Protect your face, nose or ears by covering the area with dry, gloved hands. Don't rub the affected skin with snow or anything else. And don't walk on frostbitten feet or toes if possible.
Get out of the cold. Once you're in a warm space, remove wet clothes and wrap up in a warm blanket.
Gently rewarm frostbitten areas. Soak frostbitten fingers, toes or other extremities in warm water — 105 to 110 F (about 40 to 43 C). If a thermometer isn't available, test the water by placing an uninjured hand or elbow in it — it should feel very warm, not hot. Soak for 20 to 30 minutes or until the skin becomes its normal color or loses its numbness. For the face or ears, apply a warm, wet washcloth.
Don't rewarm frostbitten skin with direct heat, such as a stove, heat lamp, fireplace or heating pad. This can cause burns.
Drink warm liquids. Tea, coffee, hot chocolate or soup can help warm you from the inside. Don't drink alcohol.
Consider pain medicine. If you're in pain, consider an over-the-counter pain reliever.
Know what to expect as skin thaws. You'll feel tingling and burning as the skin warms and normal blood flow returns. Take care to not break any blisters that may form on the affected skin. Seek medical help for anything more serious than mild frostbite.
