TATTOOS, TANNING, PIERCINGS, HAIR DYE - YES, YOU CAN DO THEM ALL.
Just because these questions get asked regularly.
Tanning: Safe. No effect on milk.
Hair dye: Safe. No effect on milk.
Piercing: Safe if the place is sterile.
Tattooing: SAFE per Dr. Thomas Hale. This is from him (with thanks to Hottubgoddess for passing it on)
As for Tatoos, we don’t have any data. Its just subcutaneous ink that is not absorbed…hence it can’t get to milk.
Tom Hale Ph.d.