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Revision as of 04:54, 20 June 2003 by Bryan Derksen (talk | contribs) (stub copied over from Diabetes dictionary)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)A callus is a small area of skin, usually on the foot, that has become thick and hard from rubbing or pressure. Calluses may lead to other problems such as serious infection. Shoes that fit well can keep calluses from forming.