Corns and callouses are protective layers of compacted, dead skin cells. They are caused by repeated friction from skin rubbing against bony areas or against an irregularity in a shoe. Corns ordinarily form on the toes and callouses on the soles of the feet. The friction and pressure can burn or otherwise be painful and may be relieved by moleskin or padding on the affected areas.
Never cut corns or callouses with any sharp instrument, and never apply home remedies, except under a podiatrist's instructions. Never use medicated corn/callous pads as they can destroy the good skin surrounding the corn or callous.