Trenchfoot is a medical condition caused by prolonged exposure to cold and wet conditions. The condition causes the feet to become numb, red, swollen, and painful. There are several synonyms for this word, including immersion foot, paddy foot, and swamp foot. All of these terms refer to the same condition and describe the same symptoms. It is important to be aware of these synonyms in order to better understand and recognize the condition. Trenchfoot can be prevented by keeping feet dry, warm, and clean. Treatment includes keeping the affected foot elevated, keeping the affected foot dry, and taking pain relievers.