You have three problems. The first is that the tattoo artist probably does not have a lot of money. Even if you sue him and win a million dollars, how can he possibly pay? The second is the extent of your damage. Is ink in your bloodstream harmful? Is it permanent? The third is the waiver. Some waivers are valid, some are not, depending upon the language and the disclosures of the known risks. Without seeing the waiver it is hard to respond further.
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Re Waiver: an exculpatory clause (waiver) designed to release one of negligence is generally unenforceable if it is against public interest. Obviously there is some significant analysis involved in whether or not your waiver is voidable. Past that, you have to establish the negligence of the tattoo "artist". Without knowing much about tattoos I have to imagine that this is probably an unreasonable result, reflecting negligence on the artist. Lastly, if this is a tattoo parlor you must hope for a valid insurance policy to cover your damages. You most likely have a long road to a recovery but in the end, may justify your time. Contingency fee arrangements are available for this type of matter. Call to consult a personal injury attorney.
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