A tattoo in a dream often represents permanence -- a decision, belief, or identity you're marking as fixed and unlikely to change. Getting a new tattoo can reflect a form of self-expression you're ready to commit to, while regretting one may point to an old choice that no longer fits who you are.
When you are loathed use Venus who has very strong influx and quick response in this and other aspects, and means renovation and growth. - Picatrix (Andalusia, ~1000.AD)