I would think the body would heal when it gets warm or medical technology is advanced enough to allow some healing.
In: Biology
Because the frost-bitten tissue is literally dead. The black tissue has no blood flow to it and it has changed colors because it’s composing. There is no healing or regenerating to be done. The blackened tissue is just dead rotting meat and if you don’t remove it quickly, the bacteria thats eating that flesh will get into the persons bloodstream and cause sepsis.
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