Frostbite cuta ce da ke faruwa a lokacin da fata da sauran kyallen jikinsu suka daskare saboda yanayin sanyi. Yawanci yana shafar wuraren jikin da ke da nisa daga zuciya, kamar yatsu, yatsu, hanci, da kunnuwa. Alamomin sanyin sanyi sun haɗa da hasarar ji da launi a yankin da abin ya shafa, da kumburi, kumburi, da lalacewar nama. A lokuta masu tsanani, sanyi na iya haifar da gangrene da kuma buƙatar yankewa.