Eczema as well as allergic reactions of different kind are to explain
only for a part of contacts with nickel-containing objects. For the pr
esent diagnostic possibilities do offer an adequate anamnesis as well
as epicutan-tests and oral provocations with nickel-sulphate. In this
context essential points of view of food-associated nickel allergy wil
l be discussed and as therapeutic consequence the possibility of a nic
kel-reduced food. Apart from the main nickel sources for the people th
e importance of earrings as causing and arrangement of the complex of
symptoms ''nickel allergy'' has to be examined.