Frostbite usually affects the fingers, toes, heels, hands, nose and feet.
It happens only in subfreezing temperatures. Numb, red and slightly swollen skin characterize superficial frostbite. It may look grey or yellowish, but becomes red and flaky after thawing. Blisters appear with deep frostbite, and skin may become cold, waxy, pale and hard. Pain may lessen and disappear.