A corn is a build-up of hard skin near a bony area of a toe or between toes. Corns may happen because of pressure from shoes that rub against your toes or cause friction between your toes. Be sure to take care of them properly. After your bath or shower, use a pumice stone to gently remove the built-up tissue. Do not use over-the-counter remedies to dissolve corns. Do not try to cut the corn or remove it with a sharp object.