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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.
Chilblains Symptoms To Watch For. Skin changes caused by chilblains may include one or more of the following: 1  Small, itchy patches with reddish purple discoloration. 2  Swelling. 3  Pain. 4  Burning sensation.