Keratosis Pilaris

ByJames G. H. Dinulos, MD, Geisel School of Medicine at Dartmouth
Reviewed/Revised May 2023
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Keratosis pilaris is a disorder of keratinization in which horny plugs fill the openings of hair follicles.

Keratosis pilaris is common. The cause is unknown, but there is often an autosomal dominant inheritance.

Keratosis pilaris is associated with atopic dermatitis, seasonal allergic rhinitis, ichthyosis vulgaris, obesity, and diabetes mellitus type 1.

Multiple small, pointed, keratotic follicular papules appear mainly on the lateral aspects of the upper arms, thighs, and buttocks. Facial lesions may also occur, particularly in children. Lesions are most prominent in cold weather and sometimes abate in the summer. Skin may appear red.

The problem is mainly cosmetic, but the disorder may cause itching or, rarely, follicular pustules.

Keratosis Pilaris
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In keratosis pilaris, horny plugs fill the openings of hair follicles.
Image provided by James G. H. Dinulos, MD.

Treatment of Keratosis Pilaris

  • Symptomatic measures

Treatment of keratosis pilaris is usually unnecessary and often unsatisfactory.

Pulse-dye and Q-switched Nd:YAG 1064 nm lasers have been used successfully to treat facial redness.

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