In the past, tattoo removal was a surgical process that would often leave a scar. However, laser technology used for tattoo removal has improved significantly over the years, delivering energy very rapidly, which means there is minimal heating, resulting in less chance of skin damage.
Tattoos are made up of ink that has been placed into the deeper layer of the skin, the dermis. This layer of skin is not shed like the upper layers of your skin, but remains in place, therefore making tattoos permanent. In order to remove them, the cells that hold the ink have to be removed.