How Often Should You Wash Your Hair, Really?
Eight questions to ask yourself before you shampoo
Fusco says the biggest problem with oily hair is the most practical one: It smells. In addition to causing odors, an oily scalp undermines hair's health and strength.
"Oily hair is not ideal," Kingsley says. "If left to set on the scalp, oils can start to smell and can irritate the skin... And a healthy, clean scalp is vital to healthy hair growth."
Some dry shampoos, like Living Proof Perfect Hair Day Dry Shampoo, are specifically formulated to bind to oil, sweat and odors so they can be brushed out of hair. Although they can't rid your hair of dirt or styling products, these dry shampoos are OK to uses a couple times a week on days you don't lather up.
(Got a dry shampoo habit you can't quit? Read on to find out why you should exfoliate your scalp.)
Image via Getty
SEE NEXT PAGE: Do You Have Dandruff?