Trench foot
The mainstay of treatment, like the treatment of gangrene, is surgical debridement, and often includes amputation. Self-treatment consists of changing socks two or three times a day and usage of plenty of talcum powder. Wherever possible, shoes and socks should be taken off, feet bathed for five minutes, patted dry, talcum powder applied and feet elevated to let air get to them.
Boot (torture)
A similar implement, the "foot press", consisted of a pair of horizontal iron plates slowly tightened around the bare foot by means of a crank mechanism, squeezing the foot with sufficient force to pulverize the bones. Although it was quite standard to line the lower plate with ribs to prevent the foot from popping out of the grip of the instrument as it became sweatier, a crueler variant of this device—typically encountered in Nuremberg, Germany—lined the upper plate with hundreds of sharp spikes. A version from Venice, sometimes called the "foot screw" or "toe breaker", connected the crank mechanism to a drill that slowly mutilated the foot by boring a hole through the center of the instep as the press was tightened. In the most extreme case, the press was tightened until the plates met, so grinding the foot bones to powder.