Keratosis pilaris

Small rough bumps, generally on the face, upper arms, and thighs. Keratosis refers to a localized overgrowth of the upper layer of skin. Pilaris pertains to the hair. In keratosis pilaris, the buildup of keratin (the hard protein in the skin, nails, and hair) is limited to the hair follicles.

* * *

keratosis pi·la·ris -pi-'ler-əs n a condition marked by the formation of hard conical elevations in the openings of the sebaceous glands esp. of the thighs and arms that resemble permanent goose bumps

* * *

a common, benign condition in which hyperkeratosis occurs around hair follicles, usually on the extensor surfaces of the thighs and arms, but sometimes elsewhere; there are discrete follicular papules that reform after removal.