Corns and calluses are a thickening of the outer layer of skin. This thickening is known medically as hyperkeratosis. Corns and calluses develop as part of the skin's normal defense against prolonged rubbing, pressure and other forms of local irritation.
Corns - A corn is a protective thickening of the skin on a bony, knobby portion of a toe. At the center of a corn is often a very dense knot of skin called a core, which is located over the area of greatest...
Actinic Keratosis (AK), also called Solar Keratosis, is a pre-cancerous, pre-malignant rough spot on the skin. It is usually between 2 and... Read more »
Source: ADAM Encyclopedia
Solar keratosis; Sun-induced skin changes - keratosis; Keratosis - actinic (solar)SymptomsActinic keratosis is usually found on the face, scalp, back... Read more »
Source: ADAM Encyclopedia
Benign skin tumors - keratosis; Keratosis - seborrheic; Senile keratosisSymptomsSymptoms are skin growths that:Are located on the face, chest,... Read more »
Source: ADAM Encyclopedia
Keratosis pilaris is a common skin condition in which a protein in the skin called keratin forms hard plugs within hair follicles.Causes, incidence,... Read more »
Source: ADAM Encyclopedia
Keratosis obturans is the build up of extra skin cells and flakey skin in the ear canal. It may be associated with pain or mild hearing loss. ... Read more »
Source: ADAM Encyclopedia
Actinic keratosis is a small, rough, raised area found on skin that has been exposed to the sun over a long period of time.Over many years, some... Read more »