Chilblains

Also known as: Perniosis, Pernio
Chilblains (perniosis, also known as pernio) is a reaction to cold, nonfreezing temperatures. It is seen most often in young people who have Raynaud's phenomenon and people who are exposed to damp, cold weather.

Symptoms develop 2 to 14 hours after exposure to cold and usually affect the hands, ears, lower legs, or feet.

Symptoms include:
  • Local redness and swelling
  • Skin bumps
  • Changes in sensation, such as itching or burning
  • Tender blue bumps that develop after rewarming
  • Blisters and ulcers (in severe cases)
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