Adult ADHD – attention deficit hyperactivity disorder – is in the spotlight on social media as more and more adults and celebrities admit to having it.

Interest is high: there are more than 190,000 publications on Instagram with the hashtag #adultadhd. A YouTube video titled “ADHD and How Everyone Can Improve Focus,” by renowned American neuroscientist Andrew Huberman, has been viewed more than 6.4 million times in the three years since it was posted.

Medical guidelines did not officially recognize this disorder in adults until the early 2000s.

You would think that this develops in adults later in life. But that’s not the case, says Dr Sally Cubbin, a neuropsychiatrist and founding member of UKAAN, the UK Adult ADHD Network. It runs one of the UK’s most recognized ADHD clinics, which focuses specifically on adults with the disorder.

Most children with ADHD become adults with ADHD, she says.