A callus on the foot is a thickening of an area of skin that may also appear as a rough, dry, or flaky patch. The thickening is a protective mechanism of skin in response to frequent friction. Manual labor, illfitting shoes or socks, and standing for long periods contribute to friction. When dead skin cells called keratinocytes collect at the center of the callus, a corn can form.

Corns and calluses usually do not require treatment unless they are painful. Over-the-counter (OTC) products containing forty percent salicylic acid may help with pain. Patches such as Dr. Scholl’s Clear Away or Liquid Corn/Callous Removers are examples. Side effects include skin peeling and dryness. These can be used in combination with a pumice stone to help remove excess skin.