A Answers (2)
Mehmet Oz, MD, Cardiology, answeredKeratosis pilaris is caused by a build up of keratin in the skin, which plugs hair follicles. The result is a collection of small bumps or rough skin.
Honor Society of Nursing (STTI) answered
Keratosis pilaris occurs when small pieces of keratin, a protective protein in the skin, block hair follicles. The hair follicles then appear as small rough patches of pimply skin. Usually appearing on the outer sections of the upper arm and on the thighs, keratosis pilaris can develop anywhere on the body. Most people with keratosis pilaris have family members with the condition, too.