A nickel-free diet is virtually impossible because far too many food items contain nickel. If you are hypersensitive, you will probably have to deal with outbreaks of eczema for the rest of your life. Unfortunately, this kind of hypersensitivity is particularly bad for vegetarians and vegans as food plants are often heavier on nickel than animal products.
I found that cutting out the following common food items made a real difference:
Nuts, especially pecan and cashew
Anything with undefined flavors (aroma)
This includes all processed foods containing any of the above, almost all cereal bars and almost all pesto.
Ramona’s tip: Get used to reading labels. Always. Even for things you wouldn’t suspect.