A LITTLE KNOWLEDGE ON FROSBITE VERSUS WOUNDS IN GENERAL.
Here's the definition of frostbite:
If frostbite is severe, the loss of blood supply to the tissue may cause it to die (gangrene). A type of surgery called debridement may be needed to remove the dead tissue. Amputation may be needed if frostbite is severe.
LOSS OF BLOOD SUPPLY IE NECROSED TISSUE.
Actipatch, ie PSWT, exactly works on that area of a wound ie new vascularization and hence new tissue granulation. Its all part of the Nitric Oxide Cascade.