Attention deficit hyperactivity disorder, or ADHD, is a disease which adversely affects the mind of a child and ultimately reduces his or her concentration. Apart from experiencing a lack of concentration and distraction, a patient suffering from this ailment might also become hyperactive and face problems in learning. It is actually a kind of childhood-specific behavioral disorder. A victim of this disorder becomes impulsive by nature and also develops a restless and unstable temperament which may hamper future career progression. This disorder is commonly known as hyperactivity. However, it would be wrong to confuse it with the usual playful and naughty nature of a growing kid.