Great tattoo aftercare makes a HUGE difference to the way the tattoo heals and the amount of ink pulled into the scabbing. Fun Fact: I produce several thousand pots of hand-made, organic beeswax Tattoo After Care Balm every month for one of the leading tattoo franchises. :)
Indigo, one of the most common and original tattoo inks has a sacred protective herbal function too - the samurai used to also dye their clothes with it, for added protection in battle.
RE: Are tattoos toxic?