Tattoos have long ceased to be a marker of subculture and have transformed into a mass form of self-expression. Millions of people around the world wear designs on their skin, which are applied by injecting colored pigments into the dermis—the layer of skin beneath the epidermis. But what happens to these particles next? Some of them settle in the lymph nodes, and some even reach other organs. It is precisely this journey of ink in the body that became the subject of a recent Danish study published in the journal BMC Public Health.