In fourth degree frostbite, structures below the skin are involved like muscles, tendon, and bone.

Early symptoms include a colorless appearance of the skin, a hard texture, and painless rewarming.

Later, the skin becomes black and mummified.
The amount of permanent damage can take one month or more to determine.
Autoamputation can occur after two months.
In fourth degree frostbite, structures below the skin are involved like muscles, tendon, and bone.
Early symptoms include a colorless appearance of the skin, a hard texture, and painless rewarming.
Later, the skin becomes black and mummified. The amount of permanent damage can take one month or more to determine. Autoamputation can occur after two months.
Frostbite