Corns and calluses form on the skin because of repeated pressure or
friction. A corn is a small, tender area of thickened skin that
occurs on the top or side of a toe. A callus is a rough, thickened
area of skin that appears because of repeated irritation or
pressure to an area of skin. Calluses usually develop on the palms
of the hand and soles of the feet.
Review Date: 06/04/2011
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of
Physician Assistant Studies, University of Washington, School of
Medicine; C. Benjamin Ma, MD, Assistant Professor, Chief, Sports
Medicine and Shoulder Service, UCSF Dept of Orthopaedic Surgery.
Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M.,
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)