• A very common, non-neoplastic dermatologic disorder characterized by keratinization of hair follicles of the skin. It manifests as small, rough folliculocentric keratotic papules, usually in the outer-upper arms and thighs. It affects children and adolescents and usually improves with age.
  NCI
  U.S. National Cancer Institute, 2021
• An anomaly of the hair follicles of the skin that typically presents as small, rough, brown folliculocentric papules distributed over characteristic areas of the skin, particularly the outer-upper arms and thighs.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2025
• Keratosis pilaris is a disorder of keratinization in which horny plugs fill the openings of hair follicles. Keratosis pilaris is common. The cause is unknown, but there is often an autosomal dominant inheritance.
  Merck Manuals
  Merck & Co., Inc., 2025
• Keratosis pilaris (KP) is a genetic disorder of keratinization of hair follicles of the skin. It is an extremely common benign condition that manifests as small, rough folliculocentric keratotic papules, often described as chicken bumps, chicken skin, or goose bumps, in characteristic areas of the body, particularly the outer-upper arms...
  Medscape
  WebMD, 2025
• Keratosis pilaris (ker-uh-TOE-sis pih-LAIR-is) is a common, harmless skin condition that causes dry, rough patches and tiny bumps, usually on the upper arms, thighs, cheeks or buttocks. The bumps generally don't hurt or itch.
  Mayo Clinic
  Mayo Foundation for Medical Education and Research, 2025