T35: Frostbite involving multiple body regions and unspecified frostbite
T35.1: Frostbite with tissue necrosis involving multiple body regions
Frostbite involves tissue being damaged by cold. Depending on how badly the tissue has been damaged, a distinction is drawn between superficial and deep frostbite. You have deep frostbite.
Deep frostbite involves tissue dying off because of the cold. Blisters filled with blood may form. If the frostbite damages nerves, it may no longer be possible to feel pain.
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