Charcot foot is a deformity that can result as a complication of diabetes and other conditions. It develops after you lose sensation in your legs and feet. The joints and bones of your foot begin to break down and collapse. You cannot feel these injuries, and you may continue to walk on the foot. This worsens the damage. Charcot foot is a disabling deformity. It can be difficult to treat but there are techniques that can be used to correct it.