One hour’s screen use after going to bed increases your risk of insomnia by 59%, scientists find.

A study of more than 45,000 Norwegian university students has shown that using screens in bed is strongly associated with insomnia symptoms and lower sleep duration. Researchers suspect that this is because screen time displaces sleep by taking up time when people would otherwise be resting. However, using social media was not found to be more harmful than other forms of screen use.