Tattoos: Understand risks and precautions By Mayo Clinic Staff Tattoos might be more common than ever, but don't take the risks lightly. Understand basic safety precautions and aftercare. You could be the proud owner of a new tattoo in a matter of hours — but don't let the ease of the process stop you from thinking carefully about permanent body art. Before you get a tattoo, make sure you know what's involved and how to reduce the possible risks. How tattoos are done A tattoo is a permanent mark or design made on your skin with pigments inserted through pricks into the skin's top layer. Typically, the tattoo artist uses a hand-held machine that acts much like a sewing machine, with one or more needles piercing the skin repeatedly. With every puncture, the needles insert tiny ink droplets. The process — which is done without anesthetics — causes a small amount of bleeding and slight to potentially significant pain. Know the risks Allergic reac...