Keratosis pilaris (pronounced: care-uh-TOE-siss pill-AIR-iss) is a common skin condition that causes tiny bumps. They’re most often on the upper arms, thighs, buttocks, or cheeks. Keratosis pilaris ...

Raised bumps ... neck, back, and chest. Keratosis pilaris, often called "chicken skin," results from a buildup of keratin blocking hair follicles. It commonly appears on the arms, thighs, and ...