chilblains
  凍瘡
  Chil·blain, chil·blains n.  A blain, sore, or inflammatory swelling of the feet or hands, produced by exposure to cold, and attended by itching, pain, and sometimes ulceration.
  Syn: -- pernio.
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  chilblains
       n : inflammation of the hands and feet caused by exposure to
           cold and moisture [syn: chilblain, pernio]