If someone already had blood poisoning , could it have happened if they got a tattoo ?

Tattoo side effects: Tattoos can cause skin problems such as granulomas (red bumps caused by inflammation) and keloid scars, and they can provoke allergic reactions, making skin itch and break out. These allergic reactions can occur with no warning, years after you get your tattoo. Getting a tattoo also puts you in danger of getting diseases such as aids, tetanus, hepatitis b and hepatitis c, infections.

Only: It is possible that the tattoo was a source, mbut probably only if they a local infection at the area of the tattoo first. Even then, it may have been poor hygiene of the recipient of the tattoo (rather than the tattoo itself that was a problem).