Trench foot
Trench foot can be prevented by keeping the feet clean, warm, and dry. It was also discovered in World War I that a key preventive measure was regular foot inspections; soldiers would be paired and each made responsible for the feet of the other, and they would generally apply whale oil to prevent trench foot. If left to their own devices, soldiers might neglect to take off their own boots and socks to dry their feet each day, but if it were the responsibility of another, this became less likely. Later on in the war, instances of trench foot began to decrease, probably as a result of the introduction of the aforementioned measures; of wooden duckboards to cover the muddy, wet, cold ground of the trenches; and of the increased practice of troop rotation, which kept soldiers from prolonged time at the front.
Role of geography in World War I
Trench Warfare was common during WWI, although it was not exactly the healthiest or morale-boosting experience for soldiers living in the trenches. They were constantly wet and water would often build up to several inches. Urine, body odor, poison gas, bad food, rats, little clothing, and misery all defined the trench lifestyle. Diseases such as Trench Foot emerged and close quarters caused infection to be passed from one person to another and from rats and bugs to humans as well. Loud bombs could often cause deafness and long periods in the trench often led to mental illness as well.