Okay, I've just this single tattoo since April of '06. I've tried to take good care of it the whole time so far. I don't scrub it, I don't sun it, I don't do anything to it except bathe that area like any other on my body- with Ivory and my hands. But the ink has started falling out. It started last year sometime, like the middle of the year. It's not faded, it's just GONE. All colors are falling out, but the black is the most apparent. Which brings me to my weird allergy question: How common is it to develop an allergy to ink? I did not used to, but I do now, occasionally get localized edema exactly following the black ink in my tattoo. It follows the letters precisely, all the black lines, and the large areas of black coloring. It has only ever been part of the tattoo at a time; the whole thing has never swollen up all at once. The areas experiencing the edema also itch like a bitch. I experience no other symptoms urticaria, anaphylaxis, or any other annoying/deadly condition. Just this very precisely localized deal. Is it something that's decently common? It just comes and goes randomly.