Corn

Corns are irritating and sometimes painful patches of hard, dead skin that form in response to pressure, stress or friction. They usually occur on thin or glabrous skin surfaces, especially on the dorsal surface of toes or fingers.

"Calluses" refer to a diffuse, flattened area of dead skin while a "corn" typically refers to a thick, upraised area that is circular or cone-shaped. Corns can also have an unsightly red and swollen appearance.Corns and calluses are annoying and sometimes painful thickenings in the skin in areas of repeated pressure.