Frostbite is frozen water in body tissues. Like burns]]> , frostbite injuries can be ranked in severity. First-degree frostbite is the mildest. Fourth-degree frostbite is the most severe. It may result in loss of the affected body part.
The most common parts of the body to become frostbitten include:
Frostbite happens when skin is exposed to freezing temperatures. This can cause the body tissue to freeze. Ice crystals actually form within the frozen body part. Blood cannot flow adequately through the frozen tissue. 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. Rewarming may also ultimately lead to tissue death.
Factors that increase your chance for frostbite include:
- Exposure to freezing temperatures without adequate covering
- Low body temperature ( hypothermia]]> )
- Age: very young or very old
- History of previous cold weather injury
- High-altitude cold exposure
- 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:
- Inability to move
- Using drugs that cause your blood vessels to become constricted (such as ]]>nicotine]]> )
- Medical conditions, such as:
- Coldness or firmness of tissue
- Waxy appearance of the skin
- Color ranging from red to white to blue, depending on severity
- Blisters that may be filled with clear or bloody fluid
- Numbness, stinging, burning, or tingling
- Joint pain
The doctor will ask about your symptoms and medical history. A physical exam will be done. Diagnosis is usually based on symptoms and the findings of the physical exam.
Rapid rewarming in a warm (100 to 110°F) water bath is the treatment of choice. Slow rewarming may cause more tissue damage.
If you are stranded with frostbite and unable to get medical help:
- Try to get to a warm location. Wrap yourself in blankets.
- Do not put snow or hot water on the injured area.
- Do not rub affected areas.
- Tuck your hands into your armpits to try to rewarm them.
- If it's available, use warm water (at about 105°F [40°C]) to rewarm your frostbitten area.
- Avoid refreezing the affected area. This can result in more severe injury.
- Walking on frozen feet and toes can cause damage. It may be more important to find shelter.
- Drink warm liquids.
- Avoid alcohol and sedatives.
- Cover the injured area with a clean cloth until you can get medical help.
- Rewarming can be intensely painful. To relieve pain take:
If you're able to get medical assistance, treatment may include moving you to a warm place and wrapping you in blankets. The injured body part may be soaked in warm (not hot) water.
Other treatments may include:
- Opening and emptying blisters.
- Taking antibiotics.
- Taking pain medication.
- Keeping the injured body part elevated above your heart.
- Getting a ]]>tetanus booster shot]]> .
- Receiving ]]>hyperbaric oxygen therapy]]> . This is a special chamber under greater pressure than normal. It will help with blood flow and tissue repair.
- Amputation of all or part of the affected body part. This may be necessary in severe frostbite cases.
If you are diagnosed with frostbite, follow your doctor's instructions .
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. It should keep moisture away from the skin. (eg, wool, polyester, polypropylene)
- Make sure you wear a waterproof outer layer and stay dry.
- Avoid drinking alcohol when you will be in cold weather.
American Academy of Family Physicians
National Library of Medicine
About Kids Health
Bjerke HS, Tevar A. Frostbite. Emedicine website. Available at: http://www.emedicine.com/med/topic2815.htm .
Conn's Current Therapy 2001 . 53rd ed. WB Saunders Company; 2001.
Emergency Medicine: Concepts and Clinical Practice . 4th ed. Mosby-Year Book; 1998.
Mechem CC. Frostbite. Emedicine website. Available at: http://www.emedicine.com/emerg/topic209.htm .
Last reviewed February 2009 by ]]>Ross Zeltser, MD]]>
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.
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