Trench foot (immersion foot) is a cold injury that occurs gradually
over several days of exposure to cold, but not freezing, temperatures. The name
comes from World War I troops who developed symptoms after standing in cold,
Signs and symptoms of trench foot include:
Red skin that turns pale and
Numbness or burning pain.
No actual freezing of the skin.
A slow or
absent pulse in the foot.
Development of blisters or ulcers after 2
to 7 days.
First aid for trench foot includes rewarming the affected areas,
relieving pain, and preventing problems such as infection or dead skin