Look into high histamine and histamine releasing foods. You might not produce enough anti-histamine enzyme (DOA) and it'll feel like a food intollerance.
High histamine foods: anything fermented (sauerkraut, chocolate, yogurt, aged cheeses, soy sauce, etc); aged and preserved foods (bacon, ham, sausages); tomaotes; seafood; alcohol
Histamine releasing foods: pineapple, citrus, chicken, pork
I'm sure I'm forgetting a bunch. Anyway, there's a ton of stuff that releases histamines that are on the elimination diets, You might have some success trying to avoid the histamine foods instead. It's not destroyed by cooking, so your best bet is avoidance. It totally sucks, but it's helped me a lot.
Poke it quickly, with a stick.