Refers to the red, itchy swelling on fingers, toes, or ears caused by exposure to cold. In everyday Japanese, しもやけ is more commonly used for chilblains, while severe tissue-freezing frostbite is often called 凍傷 (とうしょう).
After playing outside on a cold day, I got chilblains on my hands.
My chilblains are so itchy I can't stand it.
Standard kanji spelling.
Variant spelling without okurigana; less common but still encountered.
Compound of 霜 (しも, frost) and 焼け (やけ, burning), from the burning sensation caused by the cold.