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Chilblains (/ËtÊÉªlbleÉªnz/) â also known as pernio, Chill Burns and perniosis â is a medical condition that occurs when a predisposed individual is exposed to cold and humidity, causing tissue damage. It is often confused with frostbite and trench foot.
They usually go away over 7-14 days. If you are prone to developing chilblains then you should keep warm in cold weather. Chilblains (sometimes called pernio) are small, itchy, painful, red swellings on the skin.Chilblains are caused by an abnormal skin reaction to cold. They tend to occur on 'extremities' that more easily become cold. That is, your toes, fingers, nose and earlobes.However, other areas of skin sometimes develop chilblains when they become cold.hilblains are caused by an abnormal skin reaction to cold. They tend to occur on 'extremities' that more easily become cold. That is, your toes, fingers, nose and earlobes. However, other areas of skin sometimes develop chilblains when they become cold.