Bumps on the arms often result from keratosis pilaris, commonly known as chicken skin. Other possible causes can range from inflammatory skin conditions to irritation, such as folliculitis.

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 ...

Medically reviewed by Susan Bard, MD Psoriasis frequently appears on the arms, often on your elbow. Several types of ...