Add Yahoo as a preferred source to see more of our stories on Google. Photo credit: EPHEMERAL TATTOO; BEN HUA YU; CHLOE KRAMMEL/MEN'S HEALTH ILLUSTRATION WHEN I first heard of Ephemeral Tattoo, I ...

Allergic reactions are common side effects of tattoos and pigments have been blamed for this. Now researchers prove, for the first time, that particles wear from the needle during the tattooing ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A 2,000-year-old tattooing tool has been discovered in Utah—the oldest ...

If you've never gotten a tattoo, you might think that a tattoo needle works by "injecting" ink under the skin. That's sort of true, but close-up and slowed-down footage of the process reveals some ...

A tattoo that is warning you for too many hours of sunlight exposure, or is alerting you for taking your medication? Next to their cosmetic role, tattoos could get new functionality using intelligent ...