Folliculitis happens when your hair follicles become inflamed, causing bumps. It's most common on the legs, butt, arms, back, and beard areas. You can treat folliculitis by changing the way you ...

Symptoms of folliculitis on the buttocks include ... though you might only notice them when you run your hand over affected skin. Keratosis pilaris bumps may look like tiny pimples or goosebumps.

Superficial folliculitis is an inflammation of the upper section of the hair follicle, and may be caused by an injury to the follicle, by infection, or by a chemical irritation of the follicle.