Hereditary forms of folliculitis, such as follicular eczema (generally classified under "atopic dermatitis"), and the deeper forms of inflammatory folliculitis that involve the entire follicular structure, such as folliculitis decalvans, occur most commonly in blacks. Folliculitis may also be seen as a secondary infection in conditions such as eczema, scabies, and excoriated insect bites. It is more commonly found in patients who are diabetic, obese, or immunocompromised.