I have heard that if your diabetic you cannot get tattoos or piercings. For me, I have 17 tattoos, and 13 piercings. No, I don't look like a tattoo and piercing freak. The tattoos I got all mean something, the shop I go to is very clean. You can eat something off the floor good. For my piercings, I have my tongue, nose, and lip, and ears pierced. I can wear outfits that you wouldn't even know I had a tattoo or piercing.
For health reasons, if you are a controlled diabetic I would say you can get a tattoo or piercing, but if you aren't you are putting your health in your own hands. I am anal retentive on my health. I still have good vision, my kidneys are great, and I do not have nerve damage.
Ask your doctor first if you are thinking about it. My doctors know all about mine and always ask if there is anything new.