“The reason shampoo works is because the dandruff on your scalp and fungal acne are both caused by an overgrowth of the skin yeast Malassezia ... “Deep, cystic acne might require retinoids ...

Fungal acne generally occurs when there's an excessive build-up of a fungus called malassezia, says Dr Rinky Kapoor, a consultant dermatologist, cosmetic dermatologist, and dermato-surgeon at The ...