Dermatologists say popular hairstyle causing premature baldness

If you're losing your hair, your trendy hair style may have something to do with it. It turns out the "top knot" and the "man bun" may be contributing to a rise in baldness.

Jennifer Lopez and Lupita Nyong'o are joining a long list of starts rocking the top knot on the red carpet.

Even Hollywood's hottest men are stepping up their hair game with the man bun.

But according to dermatologists, the hit look may be to blame for premature baldness.

"That longstanding pull or traction on the hair can pull the hair out and ultimately lead to permanent scarring, which is something we call traction alopecia," Dermatologist Doris Day said.

To avoid hair loss associated with top knots, doctors suggest not pulling the hair too tight. That's what puts long term stress on the hair and damages the follicles.