What is trench foot?
Trench foot, also known as 'immersion foot', is a condition caused by feet being wet and cold for days at a time. Trench foot can occur even when the temperature is not particularly low. In trench foot, blood circulation in the foot is slow, and feet begin to ache and grow numb. The foot can appear red, swollen and rubbery to touch. Blisters and open sores can appear, increasing the danger of infection. In serious cases of trench foot, the foot may develop gangrene, turning dark blue, purple or black and emitting a rotting stench.