Well, you can go to the doc and ask for a allergy test. They take a single vial of blood and test it for reactions.
Food based reactions can include swelling and itching of the mucus membranes, mouth nose and ears, hives, and vomitting due to swelling of the throat triggering your gag reflex. Each reaction tends to get progressively worse, and some reactions are life threatening.
Bananas are unusual to be allergic to, but not unheard of. Remove the suspected object from your diet for a period of one week, then try a small amount to test for reactivity.
at 7:46 PM on Mar. 28, 2009