A few years ago, a team of European researchers discovered nanoparticles from tattoo pigments seem to be able to travel from a tattoo site into a body’s lymph nodes. A new follow-up study has now ...

But it's not just that ink is capable of reaching the body's lymph nodes, as researchers previously revealed. Tattoo needles – even new ones – also may be playing a role. Tattoo needles typically are ...

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 ...

When news breaks, you need to understand what actually matters — and what to do about it. At Vox, our mission to help you make sense of the world has never been more vital. But we can’t do it on our ...