The number of treatments needed to remove a tattoo depends on its size, color, and the depth of penetration of the ink among other factors. An amateur tattoo may need 2-5 treatments. A professional multi-colored design might need 3-15 or more treatments. Typically after the first or second treatment is when the number of treatments can be better estimated. If you'd like to lighten a tattoo so you can cover it with a new one, the number of laser treatments will likely be 25% to 50% fewer than those needed to completely remove a tattoo.