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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.
Signs and symptoms of chilblains may include: 1  Small, itchy red areas on your skin, often on your feet or hands. 2  Possible blistering or skin ulcers. 3  Swelling of your skin.  Burning sensation on your skin.