Much remains unknown about the long-term risks
(NEWSER) - Before you get a butterfly stamped on your back, take heed: Tattoo inks can cause rashes, infections, and inflammation, and doctors still aren’t sure how the inks’ chemicals—which eventually migrate into the lymph nodes—behave in the long term. A chemical in black inks called benzo(a)pyrene, for example, has caused skin cancer in lab animals, and malignant melanomas have, on occasion, been discovered in tattoos, the San Francisco Chronicle reports. That may be coincidence, but the FDA has decided that with 45 million tattoo-adorned Americans, the topic is worth a look. More»