If she's allergic to mangoes, make sure and keep cashews out of her diet as well. Mango and cashew are in the Poison Oak family. She shouldn't even touch mango peels, as they have a similar sap on them to poison oak, although at a low enough concentration, that most people aren't affected.She is allergic to mangos and is extremely picky.
Also gingko trees might produce allergic symptoms like swolen eyelids and hayfever. The supplement Gingko Biloba should be avoided.
It also would be a good idea to keep her on a low-latex diet. Natural latex is in a lot of foods. Think stretchy, waxy peels.
Latex is a natural gum rubber that can cause allergic reactions similar to poison oak in sensitive individuals.