List of symptoms and signs from the DMS-IV required for a diagnosis of any type of ADHD. Understanding ADHD (or ADD) in adults. Attention deficit hyperactivity disorder (ADHD)—previously known as ADD—is not just a problem in children. If you were diagnosed with childhood ADHD or ADD, chances are, you've carried at least some of the symptoms into adulthood. ADHD often goes unrecognized throughout childhood.