Yes, You Can Get Mildew In Your Hair - Here's How To Avoid It - Glam

According to Healthline, the mildew that forms in hair is a fungus known as yeast. It can grow on the scalp and cause hair loss or dandruff, and some of it can even grow directly on your hair. With the presence of yeast comes the risk of yeast overgrowth, and, therefore, the possibility of a yeast infection on the scalp. Some of these infections may appear as hair ringworm (which is not actually a worm), black growths, white growths, or seborrheic dermatitis, leading to skin patches or stubborn dandruff.

Not only is hair mildew a problem for your hair and scalp simply because of its presence but also because it can affect your hair's health. "Being the environment from which hair grows, scalp health is vital for healthy hair. In fact, studies have proven that a flaky scalp can cause and/or worsen hair loss," trichologist Anabel Kingsley tells New Beauty. "Plus, if the scalp is in bad condition, the hair is likely to be dull and limp."