The painful trench foot of World War I has reappeared in the present comparatively trenchless war. In World War I, soldiers got trench foot from sitting for hours with their feet in mud or cold water. The result was something like severe chilblains, something like a burn: circulation slowed; feet became numb, swollen and white; sudden warming sometimes brought blisters and ulcers. The worst cases got gangrene, which meant amputation. Today's trench foot has different sources:
> Doctors call it immersion foot when a seaman's feet are bloated after long chilling in the sea water shipped by an open lifeboat.
>The airman's...
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