Tattoo Allergy

I have a tattoo that I believe I am allergic to. i’ve had it since the beginning of the year, it was fine up until a month ago. it started itching really bad and my tattoo would raise and feel the bumpy ink. I been putting hydrocortisone on, which has helped. But I feel like the hydrocortisone will eventually not help. Has anyone dealt with this or can recommend me any suggestions.