Once you have eliminated the foods please do bring them back bit by bit to test out if indeed a specific food does bring one on -- I would hate to go through life without a banana on the other hand -- my triggers are tropical oils ( no Cool Whip for Me ) ; cinnamon , nutmeg , star anise , Chinese Five spice , MSG -- which many people don 't understand -- you have to question in restaurants -- does it have MSG -- but also autolyzed yeast and hydrolyzed vegetable protein which metabolize into MSG .