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MedTerms Medical Dictionary

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Callus: The word "callus" has several meanings: 1) A callus or callosity is a localized firm thickening of the upper layer of skin as a result of repetitive friction. A callus on the skin of the foot has become thick and hard from rubbing (as a result of repetitive friction). Calluses of the feet may lead to other problems such as serious infections. Shoes that fit well can keep calluses from forming on the feet. (2) A callus is also the word applied to hard new bone substance that forms in an area of bone fracture. It is part of the bone repair process.


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Information in the MedTerms Medical Dictionary is provided for informational purposes only and is not a substitute for professional medical advice. You should not use this information for diagnosing or treating a medical or health condition. You should carefully read all product packaging. If you have or suspect you have a medical problem, promptly contact your professional healthcare provider.