The callus is a thickened area of skin usually of the soles. A corn, in contrast, has a nucleated core.
The skin is thickened over an area of pressure or constant rubbing. The soles are the most common sites but it also can form at the distal tips of the toes. The callus decreases the flexibility of the skin and a painful crack or fissure may result. Calluses tend to have accentuated skin marking whereas warts do not show dermatoglyphics
No treatment is needed as the thickening is natural and helpful, protecting the underlying skin. However if painful or undesired, topical 40% urea cream QD-BID over-the-counter can be quite beneficial. Routine paring may also be done. Referral to podiatry may rarely be indicated for specialized footwear.
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