Tattoos involve injecting ink into the dermal (second) layer of the skin, typically using a hand-held electric machine with needles coated in ink. While tattoo inks in the United States are subject to FDA regulation as cosmetics, none are approved for injection under the skin.
As a precaution, it is generally recommended that mothers wait until they have completed the weaning process before undergoing any laser tattoo removal. This is because there is limited evidence regarding the safety of tattoos and breastfeeding, and the potential for ink particles to enter breast milk during the removal process is not well understood.