 I'm Deborah Valentine. This is Fox News. ADHD. It's the child who can't pay attention or sits still in school, right? The answer? Maybe yes. Attention Deficit Hyperactivity Disorder, or ADHD, can be complicated, and it can last a lifetime. Living with a condition can sometimes be a challenge. It may take years to accept a formal diagnosis, and it's not always easy to find the right treatment plan.