Tattoo is itching after 9 months!!???

So I’ve had my tattoo for about nine months and recently it’s started to itch something terrible. It’s on my rib cage and I get bumps on my torso that itch a lot but these bumps are only in the tattoo and seem to follow the lines. I put A&D; on it all the time as well as unscented Aveeno lotion. Any idea what this could be? Can I use any other topical treatment safely? Can I scratch it? Or should I just suffer through it. It’s only black line work.