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Originally posted by LDragonFire
Ask any WWII or Vietnam vet or about Trench Foot
Trench foot occurs when feet are cold and damp while wearing constricting footwear. Unlike frostbite, trench foot does not require freezing temperatures and can occur in temperatures up to 60° Fahrenheit (about 16° Celsius). Trench foot can occur with only twelve hours of exposure. When affected by trench foot, the feet become numb, followed by a change in color to red or blue. As the condition worsens, the feet may swell. Advanced trench foot often involves blisters and open sores, which lead to fungal infections. In such cases trench foot is also known as "jungle rot". If left untreated, trench foot usually results in gangrene and then requires amputation. If treated properly and quickly, complete recovery is normal, but recovery is marked by severe short-term pain as feeling returns.
There is also a fungus affecting gulf war vets but I haven't found a link, its similar to trench foot but there is no cure, a Dude I work with, a Iraqi war vet has it, I'll get more info when I see him.