Dr. Bruce Katz, the director of JUVA Skin and Laser Center who works with tattoo removal, told Newsweek there are a number of reasons a tattoo may fade or the ink disappears.
"If put in too superficially, the tattoo ink will slough off the skin," he said. "That doesn't happen if the ink is put in the skin deeply."
And, there are cases in which tattoo ink is not injected heavily enough––or boldly enough––into the skin, which causes the ink to break down and get carried away by the blood system before it is excreted.
Additionally, a tattoo client may experience an allergic reaction to the ink, causing the ink to be rejected. Katz said red is the most common color of ink to cause an allergic reaction.
