You've planned out the ultimate tattoo—the art, the colors, where on your body you'll get it done, the shop, the artist. You've put a lot of thought into this image that will forever adorn you, but ...

Like a lot of Millennials, Sarah Curley has some tattoos. The public-health educator, who lives in Madison, Wisconsin, has a bouquet of wildflowers and the Greek word sophrosyne (meaning “temperance”) ...

From minimalist wrist designs to full sleeves, body art has become so common that it barely raises an eyebrow. But while the personal meaning of a tattoo may be obvious, the biological consequences ...