OCD is a neurobiological condition. It is estimated that 1% to 3% of children and adolescents are affected by obsession- compulsive disorder (OCD).The DSM-IV defines OCD as persistent thoughts, impulses, or images that are experienced as inappropriate and the cause of anxiety and distress. These thoughts cause obsession as a way to ease their anxiety. Your child may perform repetitive actions such as chewing food a certain number of times, refusing to eat certain foods, separation anxiety or a need for order and perfection