Corns are growths of corneous cells that usually appear between toes, on toe mounds, at the outer edge of the foot arch, or on heels. They resemble a thorn and because of their conical shape, they penetrate the deeper layers of the skin where the nerves are located, therefore causing pain. The deeper the corn, the more painful it is. Feet deformations are usually the reason for recurring corns. With age, the feet change their shape and expand, and their bone structure shifts. Feet deformation can also be caused by tight footwear, sports activities, and tight work shoes prescribed by regulations in some companies.