Is it harmful to get a tattoo with an aneurysm?

What type: I assume you have an aneurysm but where, cerebral circulation, aorta, small artery , vein? Bottom line is a tattoo will not harm your aneurysm but a sharp rise in your blood pressure will increase the pressure in the aneurysm making it more likely to burst. Any pain will raise your blood pressure so tattooing causes pain and thus there is a risk. Avoid the tat the aneurysm is more important.