@LewisK123 . A few things to consider regarding tattoos.
1. Choose a reputable tattooist and explain your condition. A tattoo can be time consuming, you may need to check your BS levels and eat if necessary. A good tattooist will be more than happy to take a break and allow time for a snack if needs be.
2. If your BS control is good then risk of complications should be minimal, likewise if your control isn’t good then you maybe at more risk of infection and slow healing.
3. Are you taking any blood thinning medication, aspirin is often prescribed to type 1’s. Something you may need to consider especially if you’re having a lot of work done in one sitting. It takes around 5/7 days for the effects of aspirin to leave the blood system. Ask your GP for advice. I personally stopped aspirin for a week prior to being tattooed in order to help blood clotting.
4. After being tattooed take all necessary precautions to avoid infection. A good tattooist should give all relevant advice. If you’re in any doubt seek another tattooist.
Good luck.