What would be the risk if i decide to have a tattoo while suffering from uncontrolled graves' disease? i really want to get tattoos.

None.: I am not aware of an issue between a tattoo and grave's disease. However it is more important to get the grave's controlled than getting a tattoo. Don't mess with grave's or you may be in one. See your doctor.

Hepatitis etc: Why is your grave's disease uncontrolled? Go see your gp & take care of it. Risk from tattoos is hepatitis and other blood born infections.

Probably none: Just make sure it is a clean place as the biggest risk is hepatitis b.