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By Mayo Clinic staffKeratosis pilaris (ker-uh-TO-sis pil-AIR-is) is a common skin condition that causes rough patches and small, acne-like bumps, usually on the arms and thighs. Though you may not like the sandpaper-like appearance of your skin, keratosis pilaris isn't serious and doesn't have long-term health implications.
Keratosis pilaris can be frustrating because it's difficult to treat. Prescription medications and self-care measures can improve the appearance of your skin.