| Well if he has blocked enough if his pores, seems plausible.  Injecting all that ink beneath the skin, basically a foreign substance, has to travel throughout the body, has to.  And I am sure tattoo artist autoclave their instruments (sarcasm).  My wife has come home from her work in the hospital more than once over the years, and said a patient's tattoos restricted where the IV line was placed. Hopefully the doctors will be able to help, and I hope your friend gets betterPosted from my iPhone/Mobile device
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