Keratosis pilaris is a common skin disorder in which the openings of the hair follicles become plugged. The affected areas are not contagious, and occur on the skin of the backs of upper arms, fronts of thighs or buttocks. It more common in children and young adults.
Causes of Keratosis Pilaris
The exact cause of keratosis pilaris is not known. There appears to be a hereditary component to this disorder. It is associated with allergic dermatitis and several types of ichthyosis, both of which have strong hereditary links. Lesions occurring in vitamin A deficiency appear to be the same as those occurring in keratosis pilaris.
Signs and Symptoms of Keratosis Pilaris
Symptoms of keratoses pilaris include small papules, or raised bumps. They are small, firm and white. Rubbing your hand over them produces a dry sandpaper feel. They usually occur in clusters. At the openings of the affected hair follicles, debris can be scooped out with the fingernail, revealing a coiled hair inside of white, semisolid material. They are not painful and do not usually itch.
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Medical Content Last Updated on 07/12/2008
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