Here are the Signs of a Moldy Scalp & How to Fix It Did you know it's possible to have a moldy scalp? While "moldy scalp" isn’t the formal medical term, it’s the internet’s way of describing what happens when yeast or fungus has made itself at home on your scalp. Malassezia; a yeast that naturally lives on skin, is the most common fungus found on scalps and it thrives in damp environments. If you're concerned you may be experiencing this, read on for a breakdown of the seven signs of a moldy scalp, plus how to fix...