My son is 6 years old and has autism. He is taking all therapies including occupational therapy from last 3 years. Suddenly from last 10 days, his behaviour has changed. He cries anytime and run here and there, jumps, grinding. We are not able to control him when he starts crying. Earlier he was not like that he was hyperactive but never cry like this. We went to paediatric and checked him. Everything is okay according to paediatric. Please suggest is this sensory problem or something else? Whom should I contact?