Because many of the symptoms of ADHD overlap with those of many other conditions, including sleep disorders, misdiagnosis can occur, reports Medical News Today.

If people experience sleep problems such as insomnia or obstructive sleep apnea (OSA), it can cause similar symptoms to ADHD, including:

  • difficulty in concentrating

  • restlessness

  • daytime sleepiness

  • decrease in performance at school or work