A tattoo is a permanent kind of body art. A design is made by puncturing the skin with needles and injecting ink, dyes, and pigments into the deep layer of the skin.
Tattoos used to be done manually — that is, the tattoo artist would puncture the skin with a needle and inject the ink by hand. Though this process is still used in some parts of the world, professional tattoo artists use tattoo machines. A tattoo machine powers the needles up and down as ink is deposited in the skin.