Medical Definition of Keratosis pilaris

  • Medical Author:
    William C. Shiel Jr., MD, FACP, FACR

    Dr. Shiel received a Bachelor of Science degree with honors from the University of Notre Dame. There he was involved in research in radiation biology and received the Huisking Scholarship. After graduating from St. Louis University School of Medicine, he completed his Internal Medicine residency and Rheumatology fellowship at the University of California, Irvine. He is board-certified in Internal Medicine and Rheumatology.

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.

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Reviewed on 12/27/2018

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