What is this paper about
This review shows that tattooing is far more than cosmetic ink: it maps how tattoos can act as long-term biological exposures linked to inflammation, pigment migration, diagnostic confusion, allergic disease, and possible cancer signals, while also serving as powerful medical tools in reconstruction, localization, drug delivery, and wearable sensing. The full paper is worth reading because it turns a scattered and emotionally charged topic into a clinically useful evidence map of where tattooing helps, where it harms, and which risks, technologies, and unanswered questions matter most.
