Is dandruff more common in the winter months?

“Dandruff is caused by your body’s reaction to a yeast that lives on the skin,” says Jodi Ganz, M.D., a dermatologist at Piedmont. “This yeast is particularly common in hair-bearing areas. The yeast is normal; it is supposed to be there. But when your body reacts to the yeast, it causes a red, flaky rash.”

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