One of the most discreet types of tattoos a person can get is a UV tattoo. Why? The tattoo only is visible under a black-light or UV light. To the naked eye in normal lighting, the skin appears normal with no ink at all. However, the UV ink has been put into question by some who believe the ink is not healthy. Some tattoo artists do not even carry the ink in their parlors. "Statistically, there have been more reactions with UV tattoos than with normal tattoos. Sometimes the inks don't m