How does gaming affect your brain?
18 June 2018 Last updated at 14:02 BST
Hamish loves playing the video game Fortnite, but does his brain show signs of addiction?
He and his brother Noah had their brains scanned while playing.
Gaming addiction has been listed as a mental health condition for the first time by the World Health Organisation. Here are some tips for staying healthy and enjoying gaming.
Watch the BBC's Victoria Derbyshire programme on weekdays between 09:00 and 11:00 on BBC Two and the BBC News Channel in the UK.