Not much: The terms "corn" and "callus" can be used interchangeably, but podiatrists use "callus" to describe a buildup of skin on the bottom of the foot or heel, and "corn" to describe a callus that forms on a toe.
Answered 7/14/2015
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Yes there can be: Corn is a hard localized and more defined skin lesion, callus is more diffuse under a bony prominence.
Answered 6/7/2017
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