What causes keratosis pilaris (KP)?

Updated: Aug 12, 2019
  • Author: Ally N Alai, MD, FAAD; Chief Editor: Dirk M Elston, MD  more...
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The etiology of keratosis pilaris (KP) is not fully known. The definite association of hyperkeratinization has been established. Of persons affected, 50-70% have a genetic predisposition. Dry skin conditions seem to exacerbate the disease. Symptoms generally tend to worsen in winter and improve in summer. Common associations include several ichthyoses, especially ichthyosis vulgaris and atopic dermatitis. [7] Keratosis pilaris is more common in siblings and in twins.

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