Sometimes I have a histamine reaction and it can give me the "throwing up" feeling. In fact, it HAS caused me to throw up a few times! Once it was from a very ripe banana. I ate about half of it, felt funny and threw up about 3 to 5 minutes later. It's not a real "allergy" but more of an intolerance thing. I can handle bananas just fine - just not super ripe ones.
I first got sick from histamine by accidentally eating a lot of high histamine foods at once (in a single day). I had hot cocoa (cocoa is high in histamine), had canned pineapple in juice (any food in a can would be high histamine from what I understand) and pasta made with canned tomatoes. Boy, it really clobbered me!
I had chills, racing heartbeat, felt very nauseous (but did not throw up that time) and had weird feelings in my limbs that are hard to describe (sort of a vibration but very mild - its like that feeling when you did lots of intense physical exercise and your really tired and your limbs feel weak). I also sneezed here and there - just single sneezes hours apart for no reason during my reaction - I felt funny for a few days. Sometimes people with a histamine reaction think they have the flu. It can do different things to different people and you don't always get the same reaction. I generally prefer fresh stuff, but sometimes in this winter weather its hard to get out and then I rely on "safe" canned stuff but did not expect the histamine problem.
Histamine builds up in the body if you eat too many foods high in histamine close together and then it clobbers you. Oddly enough I can eat yogurt and it doesn't seem to bother me any - I just found a safe plain yogurt and have been eating it daily. I say this because "fermented foods" should be high histamine from what I understand... yet yogurt is supposed to help the gut (
) so... Anyway, I recently found some plain stuff that is free of the stupid "natural Flavors" I react to.
Almost everything seems to have Natural Flavors added to it these days, even the stuff at the health food store.
Sometimes people on the paleo diet like I am run into this histamine problem. Due to soy, I'm pretty much forced to eat this way.
Soybean oil has also given me a throwing up feeling. I am allergic to soy and that was one of the things that helped me find my allergy.
I hope this gives you a new avenue to search for a possible answer.
I once read histamine problems are caused by a lack of enzymes but I don't know if that's true or not.