What Is Keratosis Pilaris?

Also known as follicular keratosis or “chicken skin,” KP is an incredibly common hereditary condition characterized by rough bumps on the skin. Keratosis pilaris occurs when excess keratin (a protein in the skin) accumulates in the hair follicles. The keratin forms a hard plug (hyperkeratinization) that caps off the hair follicle and traps the hair under the skin. This condition is common for women to have on their upper arms.