Autism is a neurodevelopmental disorder characterized by the impaired social interaction, verbal and nonverbal. Autism is a lifelong developmental disability that affects how a person communicate with and relates to other people. 

     Autism presents itself during the first three years of a person's life. The condition is the result of a neurological disorder that has an effect on normal brain function, affecting development and the person's communication and social interaction skills. They lack the necessary playing and talking skills. A person with autism will find it hard to understand the feeling of others. 

     The person with autism might give the impression that he is talking at the people rather than with or to them. They will talk about himself more than other people. Autism doesn't come with a manual. It comes with a parent that never gives up. If a pregnant woman gets flu or has fever that persists for more than one week there is a greater chance that her offspring will be diagnosed with autism. Even influenza during pregnancy, antibiotics usage during pregnancy cause the child to be autism. If a pregnant woman is exposed to air traffic pollution during pregnancy the risk of autism in her offspring is greater. 

     Autism is a developmental disorders in which a child engage in repetitive behaviour and has trouble communicating and connecting with others. It is usually diagnosed around the age of 2-3 although some sign show earlier. A autism person usually finds sudden loud noises unpleasant and quite shocking .The same can happen with smells and sudden changes in the intensity of lighting and ambient temperature. 

Many children with autism will often repeat words or phrases they hear an event called echolalia. The speech of a person with autism may sound much more formal and woody, compared to other people's speech. A person with autism likes predictability, repeatative behaviour like hop skip jump for 5 to 10 minutes, drawing same picture page after page. They may learn how to do something the hard way before they learn how to do it easy way. Autism people have high IQ and a unique talent for computer science. 

      Symptoms of autism are usually noticed first by parents and other caregivers sometimes during the child's first three years. But it is difficult to identify. Parents often become concerned when their toddler doesn't like to be held does not seem interest in playing certain games such as peekaboo and does not begin to talk, they are confused about child's hearing abilities. They live in the world if their own. Some adults with autism are able to work and live on their own. They lead independent life and is related to intelligence and ability to communicate.