<s>[INST] I have a blood clotting disorder that I have to take coumidin for. I've had it since I was 16. I'm 24 now. I really want to get a tattoo and I've been told that it's not a good idea. I would have to go on heparin shots and they are expensive. The whole thing is very messy. What if I just wanted to little words in black ink on my back?? Is is that dangerous to my health?? [/INST] Hi, dearI have gone through your question. I can understand your concern. You have blood coagulation disorder.  So tatooing is not a good idea. It can causes bleeding.  So if possible avoid that. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using health care magic. Wish you a very good health. </s>