Can you not go five minutes without checking your phone? Do you open Instagram "just for a second" and find that half an hour later you are still there? Do you wake up during the night and the first thing you do is check your notifications? Or do you keep scrolling through bad news even though you know perfectly well it is making you anxious?

Welcome to the age of new digital addictions.

Experts stress that the point is not to demonise smartphones, social networks or video games. The digital world is now part of our lives and can bring huge benefits. The problem begins when use becomes hard to control and starts to crowd out sleep, work, study, relationships or physical activity.

And research is starting to put a name to many of these behaviours.

The first real diagnosis: gaming disorder