DR H.C.ROBINSON / SCIENCE PHOTO LIBRARY DR H.C.ROBINSON / SCIENCE PHOTO LIBRARY
Diabetic callus. Close-up of the heel of a diabetic patient showing callus formation. At centre is a "heelsore" which has healed; around it is thickened skin of the callus. Calluses on the foot occur when the body weight is borne unevenly due to incorrect posture or walking. They form in areas of the skin subject to regular or prolonged pressure or friction. Diabetic patients may be unaware of callus formation, due to insensitivity of the feet in neuropathy (peripheral nerve damage), or a poor blood supply due to obstructive arterial disease. Both callus formation and skin ulceration are common examples of tissue damage to the feet of diabetics.
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