Experts say there’s no one-size-fits-all rule for washing your hair—but knowing your hair type, age, and lifestyle can help ...

We asked a dermatologist to break down just how often you should be shampooing your hair.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Confession: I wash my hair almost every single day. I know, I know—it sounds like a cardinal sin for a ...