What is frostbite?
Frostbite is a serious cold-weather injury that happens when skin and deeper tissues freeze. It most often affects areas exposed to the cold, including the fingers, toes, nose, ears, cheeks, and chin.
When tissues freeze, blood flow and oxygen to the area decrease. Mild cases may heal completely, but severe frostbite can damage nerves, skin, and other tissues if treatment is delayed.
Frostbite is caused by exposure to freezing temperatures, especially when wind, moisture, or wet clothing are involved. Risk increases when blood flow to the skin is reduced.
Factors that may increase the risk include:
- Diabetes or circulation problems
- Raynaud phenomenon
- Smoking or alcohol use
- Tight boots, gloves, or socks
- Long periods outdoors in cold weather
- Direct contact with ice or frozen objects
Symptoms
Frostbite symptoms can develop slowly or appear quickly in extreme cold. Early treatment is important to help prevent long-term damage.
Common symptoms include:
- Numbness or loss of feeling
- Tingling or burning sensations
- Pale, white, gray, or bluish skin
- Skin that feels hard, firm, or waxy
- Pain when the area begins warming
- Swelling or blisters
- Dark or blackened skin in severe cases
How is it diagnosed?
A healthcare provider can often diagnose frostbite by examining the affected skin and discussing recent cold exposure. They will also check for signs of hypothermia, which can happen at the same time and may become life-threatening.
If deeper tissue damage is suspected, imaging tests such as X-rays or MRI scans may be used to evaluate muscles, bones, and circulation.
How is it treated?
Treatment begins by safely warming the affected area as soon as possible. Wet clothing should be removed, and the person should move indoors or to a protected environment.
Providers may recommend:
- Rewarming the skin in warm water
- Clean bandages to protect the area
- Pain medicine during the warming process
- Keeping the area elevated and protected
- Monitoring for infection
It is important not to rub frostbitten skin or place it near direct heat sources like heating pads or fireplaces, as this can worsen tissue damage.
Severe frostbite may require hospital treatment. In advanced cases, medications may be used to improve blood flow or reduce clotting. Surgery may be needed if tissue damage becomes severe.
Recovery depends on how deeply the tissue was affected. Mild frostbite may improve within a few weeks, while severe injuries can take months to heal and may leave lasting sensitivity or numbness.
