Diets work for some people. Im one who it doesnt work for. I AM allergic to nickel and too much foods containing nickel cause an eczema on my right hand..

Have you tried cutting out the nightshade plants Lindsay, potatoes, tomatoes and peppers are the three most common.

Acv, kefir and kombucha are all high histamine.
If you read through and follow the advice given here on diets you will see improvements but it takes time. Good luck and keep your spirits up.