Trench Foot is defined as:

• A. A cold injury of the feet caused by immersion in wet cold for prolonged periods.
• B. Frostbite of the toes.
• C. A heat-related foot blister.
• D. Chilblain on the feet.

Answer: (A)

Trench foot is a cold injury of the feet that results from prolonged immersion in wet, cold conditions. The ongoing moisture keeps the skin and tissues damp while the cold slows blood flow, leading to tissue damage, numbness, swelling, and blistering over time, with a risk of more serious harm if not treated. This distinguishes it from frostbite, which is freezing of tissue due to very cold temperatures and presents with pale or waxy skin and signs of freezing injury. It also differs from chilblains, which are inflammatory skin lesions caused by cold exposure at milder temperatures and are not driven by prolonged wet immersion. A heat-related foot blister would arise from heat exposure, not cold. Preventive steps include keeping feet dry, changing wet socks, and avoiding prolonged exposure to cold, wet environments.