Keratosis pilaris is a common genetic skin condition which
appears as rough, bumpy, sometimes red skin most often found on
upper arms, thighs, and cheeks. These bumps are due to a buildup
of keratin, a hard protective protein found in skin, hair, and
nails. This built up keratin forms a plug which blocks the
opening of hair follicles. When these plugs, or bumps, become
irritated it causes redness. Keratosis pilaris usually presents
in childhood, often at its worst during puberty, but can
continue into adulthood. The condition usually improves in
warmer weather, while dry weather seems to exacerbate symptoms.
There is no known cure for Keratosis pilaris, though steps can
be taken to keep minimize bumps and redness.