Autism is a kind of Pervasive Developmental Disorder, in which a child or an individual suffers from various problems. Child or the individual is not able to perform normal activities at an age, where other children are able to perform various activities including playing with friends and speaking fluently. The child may repeat the words over and over again; he or she may not be able to properly walk as other children do. The child restricts to himself only, and does not play with others. All these are signs of Autism, and it is sometimes very difficult to detect and understand.