Trench foot, also called immersion foot, is a medical condition characterized by a tingling or itching sensation of the foot accompanied by swelling, pain, and numbness. A person with trench foot may also develop blotchy, cold skin and have a heavy or prickly feeling in his or her foot. Typically, the foot also feels dry and painful and becomes red when warm.

Leg cramps are common in those with trench foot, and the pulse may be slowed or completely stopped in the affected foot. A person with trench foot may also develop blisters on the foot within two to seven days after the foot is excessively soaked. After forming blisters, the skin and other tissues on the foot die and begin falling off. When trench foot is severe and left untreated, the entire foot can be affected.

Trench foot develops after a person’s feet become wet and stay wet for an extended period of time. Cold water also aggravates the problem. For this reason, trench foot was a common illness for soldiers during World War I, as they spent a great deal of time standing in trenches that were cold and wet. In order to prevent trench foot, one should air dry and elevate the feet after they become wet. In addition, one should remove wet socks and shoes and replace them with dry ones, rather than walking around for extended periods of time wearing wet footwear.

If a person develops trench foot, there are steps he or she should take to treat the problem in order to prevent it from spreading and causing long term damage. The first step is to clean the feet thoroughly and allow them to dry. It is also important to change socks daily, making sure to wear only those that are dry and clean. In addition, socks should not be worn while sleeping or resting.

The affected foot or feet should also be treated by soaking them in warm water ranging from 102 to 110°F (about 38.9 to 43.3°C) for five minutes. Alternatively, a warm pack can be applied to the area for the same amount of time. In addition, medical attention should be sought immediately.

It is important to keep in mind that trench foot is a wound to the foot. As such, it makes the foot more prone to infection. Therefore, the affected foot or feet should be checked at least once every day for infections.