It can happen when pubic hair has been shaved, waxed, or plucked. When an ingrown hair develops, you may notice small, round bumps called papules, or small, pus-filled bumps called pustules. You may also experience pain or itching around the area of the ingrown hair. Folliculitis is a curable infection of the hair follicles caused by bacteria or a fungus. Each hair The small bumps may itch, burn, or ooze pus. Folliculitis is common in the public area, on the vagina or penis, in the groin area, and on the labia.