Trench foot (also known as swampfoot) is serious condition in which the feet become decayed due to overexposure to prolonged moisture. First described during WWI, soldiers spent their days within the trenches of Europe. They rarely changed their wet socks and wet shoes. Consequently, the skin on the bottoms of their feet would initially become irritated and odorous. Blackness and ulcers followed if not treated. Patients need to keep their feet dry. One simple treatment is to not wear wet socks to bed.