lumpy tattoo! HELP

Rh
So a couple weeks ago I noticed a few small (tiny) bumps on my tattoo that is over 8 months old... it had raised the lines of my tattoo a bit too. 
Then it started getting itchy. And it spread to all over the half of my tattoo. Now my other tattoo that is in close proximity of it is fine. But lately I have been moisturising it and it's just gotten itchier and more raised. It's starting to spread across the whole tattoo and I don't want to go to a doctor because they hate tattoos in my area... HELP? Has anyone got a clue what it is and what to do? Thanks in advance!!!