Attention Deficit Hyperactivity Disorder is a neuropsychiatric condition in which an individual is not able to concentrate or focus on a single aspect for a longer time. This leads to a lack of attention and it affects the activities of an individual in everyday life. This essay would further revolve around the different psychological aspect of Adult Attention Hyperactivity Deficit Disorder putting forward the characteristics of the disorder along with a great emphasis on the medical treatment and other related issues. To be very particular this work will focus on every aspect of the disorder relating to its evolution, treatment, etiology, and evaluation. (Grosenbach 2000 amp. Whiteman et al 1995).ADHD derives its roots from the early eighteenth century when it was diagnosed by George Still. The name, however, was not designated for the disorder in 1902 by Still. George Still found 20 children with problems of attention deficiency and postulated a theory which stated that the children may be suffering from some genetic disorder which accounted for their unusual behavior. At that time the disorder was named as the Defect of Moral Thought by George Still. These symptoms were then analyzed again in 1922 and they were named as Post Encephalitic Behavior Disorder. In 1937 Charles Bradley used stimulants to treat children who were supposed to be suffering from this disorder and it was because of this work that in 1956 Ritalin as a drug was introduced to treat the hyperactivity disorder. In early 1960 the disorder was named as Minimal Brain Dysfunction and still, stimulants were used to treat the disorder. In the latter stages of 1960, the disorder became known as Hyperkinetic Disorder of Childhood. In the 1970s more symptoms were joined with this disorder which showed how an individual would behave when he had ADHD. It was in the 1980s that the name Adult Deficiency Disorder evolved and this was included in the DSM III given by the American Psychiatric Association.