8 of the Worst Things You Can Do to Your Hair

"Ponytails are a quick and easy fix for a bad hair day or a lazy one, but tying it up too tightly can pull at your scalp and damage your roots," says Alvarez. You also want to take a break in between pony styles. Constant tugging along the hairline can lead to traction alopecia. If the goal is simply to keep your hair out of your face, Alvarez recommends using pins or clips instead.