Superficial Frostbite involves only skin and subcutaneous tissue
Appears pale, hard, cold and waxy
When re-warming, the area will feel numb, then sting and burn
It may blister and be painful for several weeks
Deep Frostbite indicates frozen skin requiring hospitalization
Rapid re-warming is necessary (100-110oF)
Tissue will become blotchy red, swollen, painful and may become gangrenous