chil·blain
noun/ˈtʃɪlbleɪn/
/ˈtʃɪlbleɪn/
[usually plural]- a painful red swelling (= an area that is larger and rounder than normal) on the hands or feet that is caused by cold or bad circulation of the blood
冻疮 Word Originmid 16th cent.: from chill + blain ‘swelling or sore on the skin’.