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The term âcornâ is often used interchangeably with callus. Essentially, they are both caused by the same thing, but visually a corn is often smaller, rounder and deeper, and a callus is usually broader, covering a larger area. A âbunionâ is the name for the enlarged bony bump located behind the big toe at the joint where it attaches to the foot.
Corns and calluses develop in the same way, but the result is different. Calluses usually develop on the heel or bottom of the foot, on your palms, or on your knees. They often appear as a thick, rough layer of skin and can be an inch or more in diameter. Calluses are rarely painful.