Ok, I will try researching this. Gawd...I don't think I can deal with yet another disorder. And this one mystifies me. He used to get irritated with us at the table and yell saying we were chewing with our mouths open, making too much noise, etc. He has chilled a bit (or at least has stopped griping because we kept telling him it was rude...it's ruder to yell at someone than it is to chew loudly and Geez, just get over it!) but now it seems to be transferring over to gum chewing and school work.