In deep frostbite, the skin is numb and feels hard, like wood. It looks pale or white. At this point, muscle and bone may be frozen. In more severe cases of frostbite, the skin can turn blue, gray or even black because of tissue injury.

Does frostbite turn black right away?

The joints and muscles of the affected area may also stop working. After the area is rewarmed, it will develop large blisters within 24 to 48 hours and the area will turn black and hard because the tissue has died, according to the Mayo Clinic.

When does frostbite turn black?

Get medical attention immediately. Big blisters will appear on the frostbitten skin a day or two afterward. Finally, the frostbitten skin turns black as its cells die from freezing.