Tattoo may have been dangerous from the use of needles, and the tools to some didn't kill germs, or didn't use needles every time. the needles are to raise the cost of services, don't invest, which will lead to infectious diseases, and many of them, Such as the virus to HIV could spread, while a needle in the body and blood coming out if the one I don't wear gloves to prevent or blood spatter, was who would spread diseases, such as Tetanus, the wound.