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Chilblains

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Introduction
Chilblains are small, itchy swellings on the skin that occur as a reaction to cold temperatures. They most often affect the body's extremities, such as the toes.
Causes of chilblains
Chilblains are the result of an abnormal reaction to the cold.
Preventing chilblains
The best way to prevent chilblains is to limit your exposure to the cold and try to improve your circulation.