1 Bacterial folliculitis. 2  This common type is marked by itchy, white, pus-filled bumps. 3  When bacterial folliculitis affects a man's beard area, it's called barber's itch. 4  It occurs when hair follicles become infected with bacteria, usually Staphylococcus aureus (staph).5  Staph bacteria live on the skin all the time.ypes of superficial folliculitis. Superficial forms of folliculitis include: 1  Bacterial folliculitis. 2  This common type is marked by itchy, white, pus-filled bumps. 3  When bacterial folliculitis affects a man's beard area, it's called barber's itch.