Frostbite is the freezing and crystallization of the skin and/or the bodily tissues under the skin. Serious cases of frostbite actually kill and damage tissue to the extent that amputation must occur. Mild frostbite affects the outer skin layers and appears as blanching or whitening of the skin. Usually these symptoms disappear as warming occurs, but the skin may appear red for several hours.
In severe cases, the frostbitten skin will appear waxy-looking with a white, grayish-yellow, or grayish-blue color. The affected part(s) will have no feeling (numbness) and blisters may be present. The tissue will feel frozen. This is a very serious condition. Other symptoms that indicate frostbite are swelling, itching, burning, and both mottled skin and deep pain as the area is warmed.
If you believe that you have frostbite, it is highly recommended that you immediately contact a medical professional.