trench foot

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A condition of the foot resembling frostbite, caused by prolonged exposure to cold and dampness and often affecting soldiers in trenches.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A medical condition which can affect the feet when they are constantly cold and wet. Similar to, but not the same as frostbite.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun resembling frostbite but without freezing; resulting from exposure to cold and wet