Frostbite

Frostbite is frozen body tissue. Like burns, frostbite injuries can be ranked in severity, with first-degree frostbite being the most mild. Fourth-degree frostbite is the most severe and may result in loss of that body part.
The most common parts of the body to become frostbitten include:
  • Fingers
  • Toes
  • Ears
  • Nose
  • Hands
  • Feet

Causes

Frostbite happens when skin is exposed to freezing temperatures. This causes the body tissue to freeze. Ice crystals actually form within the frozen body part and blood cannot flow adequately through the frozen tissues. This causes the frozen tissue to be deprived of blood and oxygen. The combination of freezing and oxygen deprivation causes tissue damage or tissue death.

Risk Factors

A risk factor is something that increases your chance of getting a disease or condition.
  • Exposure to freezing temperatures without adequate covering
  • Low body temperature (hypothermia)
  • Age: Very young or very old
  • Homeless
  • Working in freezing conditions
  • Participating in winter sports or high-altitude sports
  • Wearing wet clothing
  • Suffering from a condition that affects your mental status, such as:
    • Head injury
    • Mental illness
    • Use of mind-altering drugs or alcohol
  • Inability to move
  • Using drugs that cause your blood vessels to become constricted (such as nicotine)
  • Medical conditions, such as:
    • Malnutrition
    • Thyroid problems
    • Infection
    • Disease of the blood vessels
    • Arthritis
    • Diabetes

Symptoms

Symptoms include:
  • Swelling
  • Waxy appearance
  • Color ranging from red to white to blue, depending on severity
  • Blisters that may be filled with clear or bloody fluid
  • Numbness or tingling

Diagnosis

The doctor will ask about your symptoms and medical history, and perform a physical exam. Diagnosis is usually based on symptoms and the findings of the physical exam.

Treatment

If you are stranded with Frostbite and unable to get medical help:
  • Try to get to a warm location and wrap yourself in blankets.
  • Do not put snow or hot water on the injured area.
  • Tuck your hands into your armpits to try to rewarm them.
  • If it's available, use warm water (at about 105° F or 40° C) to rewarm your frostbitten area.
  • Avoid re-freezing the affected area. This can result in more severe injury.
  • Don't walk on frozen feet or toes.
  • Drink warm liquids.
  • Cover the injured area with a clean cloth until you can get medical help.
  • Take aspirin, acetaminophen (Tylenol), or ibuprofen (Advil, Motrin) to relieve pain. Rewarming can be intensely painful.
If you're able to get medical assistance, treatment will include: Treating Your Hypothermia – moving you to a warm place and wrapping you in blankets
Rewarming the Injured Body Part – soaking it in warm (not hot) water
Other Treatments
Other treatments may include:
  • Opening and emptying blisters
  • Antibiotics
  • Pain medication
  • Keeping the injured body part elevated above your heart
  • Tetanus booster shot
  • Hyperbaric oxygen therapy – going into a special chamber in which oxygen is under greater pressure than normal
  • Amputation of all or part of the affected body part (possible in severe frostbite cases)

Prevention

To help prevent Frostbite dress properly when going outside in cold weather. For example:
  • Cover your head, face, hands and feet adequately.
  • Wear layers of clothing.
  • Wear materials that provide good insulation and keep moisture away from the skin (wool, polyester, polypropylene).
  • Make sure you wear a waterproof outer layer.