If left on too long, the oil-absorbing powder can dry out your hair and give you an itchy, flaky scalp along with pimples, sores and hair loss -including bald patches.
That's because dry shampoo isn't actually designed to be used every day as an alternative to washing, although many of us do use it that way.
So what can you do to avoid any negative side-effects? Only use as a styling product once a week on clean hair, and wash it off shortly after use.
Watch the video above for more information, including one woman's story of how dry shampoo caused her to lose her hair.
*Slowly puts down dry shampoo bottle*