Keratosis pilaris, often referred to as "chicken skin," is a common, harmless skin condition that manifests as small, rough bumps on the skin, typically on the arms, thighs, and buttocks, although it can appear anywhere except the palms or soles of feet. The bumps are often light-colored and may feel like sandpaper. They're caused by a buildup of keratin, a protein that protects skin from harmful substances and infections. Keratosis pilaris can occur at any age but is most prevalent in children and adolescents. Here are some products that may help reduce this skin condition.