Introduction Autism is mental disorder disease that affects the development of a child’s ability. The disease is manifested in children in their first three years after birth. The disorder is characterized by impaired communication, social interaction and repetitive or restricted behaviors among the sufferers. As such, the problem affects information processing in a child’s brain leading to problems in organizing and making connections between different things and events. This is one of the disorders in the autism spectrum (ASDs) apart from Asperger syndrome and pervasive developmental disorder-Not otherwise specified (PDD-NOS) (Krebs, Mike, and Richard 23). However, despite these, mental diseases such as Autism Spectrum are not as problematic as one may think as they can be treated. Mental Disease Definition Autism us a neural development disorder that affects children below the age of three years. The disease affects the brain of a child hampering information processing. This, therefore results to impairment of social interaction and affects communication. A child is also faced with a problem or repetitive behaviors. Complications The disorder results into speech retardation, impairment of social interactions and display of repetitive behaviors. The disorder sometimes may be complicated and challenging to deal with it on its own. These complications make it complex for treatment programs. Some of the complications of the disorder include sensory problems as a person suffering from this disorder may be sensitive to sensory input which at sometimes are painful ad discomforting (Mental Disorders para. 6). These problems may also fail to respond to react to pain, heat, and cold. Seizures is another common complications and usually begins in young children with the disorder. Others include tuberculosis sclerosis which causes tumor to grow in the organs like brain, mental retardation includigng fragile x syndrome, a common mental retardation problem exhibited in males. Others include aggression, digestion problems and not common eating or sleeping habits among children. Types There are different types of autism that have been recognized in the autism spectrum (ASDs); autism, Asperger syndrome which is exhibited in young children. The children lack or delay in their language and cognitive development. The third type is the pervasive developmental disorder-not otherwise specified (PDD-NOS) (Morrison 45). This is only diagnosed when the other two disorders; autism and Asperger have not been met Autism Spectrum Definition Autism spectrum is a developmental disability that is caused by an abnormality in brain. People suffering from this disorder have difficulty with communication and social interactions. Origin The word autism came into limelight in 1938 when Hans Asperger adopted the terminology of Blurter’s of autistic psychopaths during his lecturer on child psychology in Germany. He was investigating on the ASD now Asperger syndrome. The word in his 1943 reports called infantile autism Kanner used the word in reference to children who exhibited striking behavioral similarities. However, the words became widely used and known as a separate diagnosis in 1981. Types There are a number of types of this dis