I got a tattoo (all black) on my inner arm last year and haven't had any problems until now. I also have plenty of other tattoos (black and color) and have never had a problem. But recently I've been noticing that my tattoo is itchy and the ink is raised, particularly on the darker/most-shaded areas of the tattoo. I'm getting nervous that I may be having an allergic reaction and rejecting the ink. Has anyone heard of this being a problem? What should I do? I really love this tattoo and it's really beautiful in a very visual part of my body, so I don't want the appearance to be ruined.