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.
Diabetic shoe
People with diabetic neuropathy in their feet may have a false sense of security as to how much at risk their feet actually are. An ulcer under the foot can develop in a couple of hours. The primary goal of therapeutic footwear is to prevent complications, which can include strain, ulcers, calluses, or even amputations for patients with diabetes and poor circulation. Neuropathy can also change the shape of a person's feet, which limits the range of shoes that can be worn comfortably. In addition to meeting strict guidelines, diabetic shoes must be prescribed by a physician and fit by a certified individual, such as an orthotist, podiatrist, therapeutic shoe fitter, or pedorthist. The shoes must also be equipped with a removable orthosis. Foot orthoses are devices such as shoe inserts, arch supports, or shoe fillers such as lifts, wedges and heels. The diabetic shoes and custom-molded inserts work together as a preventive system to help diabetics avoid foot injuries and improve mobility.