I hate being allergic to nickel. It's a common allergy, but what it means is that cheap earrings hurt my ears. And when the tiny wire loops that I have in my ears have the hypoallergenic coating start to flake off, it's painful. And I've slowly managed to go through all my surgical-steel/hypoallergenic coated earrings, so it means I have to go find some more now. Phooey.