Why you have dandruff: You’re sensitive to your hair’s natural fungus
Huh?! Contrary to popular belief, dandruff isn’t caused by dry skin. The real culprit: An overgrowth of a common yeast called pityrosporum orbiculare. The yeast feeds on skin oils, which may explain why people with oily scalps are more susceptible to dandruff.
“Some people make oil that is particularly likely to harbor this organism, and they get dandruff at the drop of a hat,” says Dr. Robert T. Brodell, professor and chair at the department of dermatology at the University of Mississippi Medical Center. Normally, a mild case of dandruff will respond to self treatment, so give home remedies for dandruff or over-the-counter dandruff shampoos about two weeks to work.