Is this an allergic reaction?! Photo included

Hello, I've developed bumps/spots on my wrist, where I have a month old fully healed tattoo which are extremely itchy, raised and red. I have spoke to my tattoo artist and have a doctor's appointment booked in a couple of days time but wondered if anybody knew what this could be? It seems to be getting worse and spreading as it only started with a few small bumps. The fact it is on my tattoo could be a coincidence, I have no other allergies and have not used any new products or creams.

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Any thoughts would be appreciated!