When i first met my girlfriend she described herself as a picky eater. I've come to find that "picky eater" means she basically only eats cheese, grains, and non-citrus fruits. Further more, if she is even in the same room as a food with a sight or smell that is displeasing to her, or if someone touches her after recently touching a food she doesn't like, she gets very anxious. This anxiety includes her eyes growing wide and fearful, obsessive washing of surfaces or skin that's touched the unwanted food, and on occasion I've seen the anxiety bring tears to her eyes and make her tremble. Does anyone know what might be causing this and how to treat it?