We have some bad news for anyone who loves falling asleep with wet hair. While you might think it’s great to let your hair dry naturally overnight, we’re sorry to tell you, but dermatologists warn you could be doing more damage than good.

“Sleeping with wet hair doesn’t do any particular damage to the hair shafts themselves, but it does make it more likely your hair could be flat, frizzy or generally dull-looking when you wake up,” dermatologist Jessica J. Krant said.

But it gets worse,the hair’s natural reflective shine can also be affected.

“Each hair shaft is almost ‘like roof shingles’ that stand up in one direction. However, when your hair is blowdried with gentle smoothing they lie flat (as long as it doesn’t overheat them, of course),” she said. 

“When you sleep with wet hair, your cuticles end up lying in different angles, thereby reducing the reflective shine and seal of any given shaft and making it seem dirtier,” she continued. 

You’ve been warned! 

Want more? Listen to this best bit from Jonesy & Amanda!