My son is 6 and in a fantastic mainstream school. His teacher has told me that over the last few weeks he has become very anxious at any new sounds even things like a chair being moved set him off. She's spending more and more time every day showing him where the noise is from and calming him down. He's started being like this at home now too. It was a problem we had before (about 3 years ago) but he seemed to be a lot better. Any ideas on why the issue has arisen again or any ideas on how we can lessen his anxiety? Thanks.