Fungal acne is actually not acne at all and is not even caused by fungus. What we usually refer to as fungal acne is a common term for Pityrosporum folliculitis or Malassezia folliculitis, which, in layman's terms, is an infection in the hair follicle. This infection is caused by an excess of yeast (which by the way, is always present within the hair follicle) and causes inflammation, itching and acne-like bumps on your face, arms, back and chest. Although Malassezia is usually present on everybody's skin, it is often triggered due to certain lifestyle habits, medicines and recurring medical conditions. And since fungal acne isn't acne at all, your regular anti-acne medicines will have absolutely no effect on it and in some cases, even make it worse.