Tattoo means: Tattoo is the permanent inking of ink under skin using a sharp tool. Since the Neolithic period, tattooing has been practiced by humans for ritual and cosmetic purposes. The use of non-reactive pigments, disposable needles and safe work practices make tattooing relatively safe. Inks can cause inflammation and infections without these refinements. People who have keloids or are at risk of developing them should know that tattoos may cause disfiguring scars. People who are interested in permanent cosmetics such as tattooed eyebrows and lip colors, or eyeliner may notice that the color of the ink can change over time.
(in Medical Dictionary)
