Callus (overview)L84

Circumscribed, coarse thickening of the epidermis (and dermis) as a result of reactive tissue proliferation caused by mechanical pressure or friction, rarely by chemical or thermal noxae. A callus is strictly limited to the site of exposure of the causative process.

S.a.:

• Clavus ("corn" due to pressing footwear),
• Usually pressure callus on areas of skin subject to pressure (e.g., palms, soles),
• Milker calluses,
• Sucking call uses (in young children),
• thickened calluses,
• Prayer kne es or knots (in Muslims),
• housemaid's knee (analogous mechanism to prayer knee),
• fake knuckle pads.

Plate or flattened, yellowish or brownish, hard thickenings of the skin. The sense of touch is reduced. Irritated callosity: Painful (occasionally itchy) nodules with an inflammatory reddened hem. S.a.u. Clavus ("corn" due to pressing shoes), milking calluses, sucking call uses (in infants), chewing calluses, prayer knees or prayer knots (in Muslims), maid's knees (analogous mechanism to prayer knees), fake knuckle pads.

See the respective clinical picture listed under Clinic. In the case of common calluses, which mainly occur on the soles of the feet due to pressure, regular mechanical removal of the hyperkeratoses is recommended - preferably after a previous keratolytic foot bath (e.g. soap bath) with a callus plane or a simple pumice stone. The procedure should be repeated regularly.