Frostnip is cooling of the skin tissues, usually of the fingers, toes, ears, cheeks, and chin.
Frostbite is destruction of body tissues due to freezing.
Frostbitten tissues may lose sensation, are cold, solid, pale, blue-tinged, waxy and woodlike. Tissues are not resilient and vesicles that contain clear or bloody fluid may form. Frostbite should be treated by rapid thawing in a warm bath. Rubbing or manipulation should be avoided. Do not thaw until a warm environment can be maintained.