Medical Encyclopedia:
Keratosis Pilaris: Causes and symptoms
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The specific causes of this disorder are unknown. Since this disorder runs in families, it is thought to be hereditary. Keratosis pilaris is not a serious disorder and is not contagious.
The symptoms of keratosis pilaris are based on the development of small white papules the size of a grain of sand on the upper arms, thighs, and occasionally the buttocks and face. The papules occur around a hair follicle and are firm and white. They feel a little like coarse sandpaper, but they are not painful and there usually is no itching associated with them. They are easily removed and the material inside the papule usually contains a small, coiled hair.
— Sally C. McFarlane-Parrott
