does paragard iud contain nickel
It doesn't mention nickel anywhere, and that's a semi-common allergy. I have no iud experience at all, but your doctor should be able to do an allergy scratch test to find out. All copper IUDs contain copper; what else they contain varies. Paragard has a nickel core, but I think it's the only IUD that does. I've got the Nova-T380, for instance, which is just as good as the Paragard but has a silver core instead, and I think many of them are just copper and plastic. Unfortunately, Paragard is the only copper IUD available in the US.