Attention Deficit Hyperactivity Disorder is commonly known as ADHD. There are many symptoms that can lead someone to believe that others or themselves suffer from this mental illness. It is commonly noticed in children but both adolescents and adults can have it. The most common symptoms are not being able to focus, continuous hyperactivity, and uncontrollable behavior. Using the services of a professional is needed to obtain the correct diagnosis. A professional would be able to rule out other illnesses that display similar symptoms. A set of informationl books would also be helpful because they can provide information and direction to obtain the appropriate medical help.