Tomato allergy may be caused because it's a nightshade? http://www.nightshadefree.com/
I have had issues with apples and cherries too. So glad I'm not alone.
Stawberries give me a sore mouth and throat.
My mouth gets sore with avocado. I cannot eat kiwi either: I get a sore mouth and throat and nausea—unfortunate because most of my life I lived in New Zealand. Canteloupe problematic too, never eaten and organic (pesticide free) one though.
I have noticed more and more over the last five years or so that apples make me nauseated—even local organic ones. Anyone have any idea why? Granny smith is worse than say, braeburn. Some people I know struggle to believe I am allergic to the "humble" apple. I know commercial apples are one of the most—if not the most—heavily pesicide/fumigated fruits.