lol

Do you want to pay for a messed up tattoo?

Lots of tattoo artists will actually refuse for that reason. Because the skin is unpredictable, the tattoo may heal irregularly or unevenly which screws up the art and that's bad for you and bad for the artist.

This is actually pretty common. It can affect how the tattoo is carried out or how it heals, and can even open you up to infection. Granted they could have been more tactful in their wording but they were looking out for your best interest and your health.

Hopefully he gives you your money back and you can go see a dermatologist instead

if you knew your acne was bad maybe you should've had that taken care of. I would find it incredibly gross to tattoo someone with acne on their back.

Have you seen a dermatologist for it? Maybe you need an acne medication prescribed.

I know little about tattoos but would a tattoo have affected your skin in terms of oil content and other things that affect acne? Maybe are you tattoo would not react well

That's embarrassing, but reasonable enough. Would you rather have an increased risk of infection or good work turned to crud? Or would you rather have no tattoo until your problematic skin is corrected?

And can you blame him, though, really?