Friction can also contribute to the formation of folliculitis. Dr. Penzi adds that the most common cause is bacteria, but other common culprits include yeast and fungus (known as pityrosporum ...

Also known as pityrosporum folliculitis, fungal acne has an entirely different source: a yeast called Malassezia. "Malassezia yeast is a normal inhabitant of our skin, but it can overgrow in ...