Tattoos used to be permanent, but lasers can only fade them.
Lasers have made it easier to lighten tattoos, but it's not as easy or as reliable as many people think. Lightening a tattoo generally takes several treatments and can be expensive. How well it works depends on the tattoo. Many tattoos can be lightened until they are much less noticeable, but usually a trace of the tattoo remains.
Also, some tattoo colors are harder to remove than others. Laser treatments can turn some tattoos darker instead of lighter, or change them to a different color. The same goes for "permanent makeup," which is a kind of tattoo. It depends on what ingredients went into the tattoo ink to produce the color.