Tattoo removal has been performed with various tools during the history of tattooing. While tattoos were once considered permanent, it is now possible to remove them with treatments, fully or partially.
Before the development of laser tattoo removal methods, common techniques included dermabrasion, TCA (Trichloroacetic acid, an acid that removes the top layers of skin, reaching as deep as the layer in which the tattoo ink resides), salabrasion (scrubbing the skin with salt), cryosurgery and excision which is sometimes still used along with skin grafts for larger tattoos.
Tattoo excision means removing the entire tattooed area by means of surgery. Both the epidermis and the dermis is removed through this process. The skin is cut away and the edges are brought together and sutured. In case of larger tattoos, skin from another part of the body is taken and grafted onto that area.
Tattoo can also be removed by laser, the advantage of laser is that it does not leave scar however it could take up to 4 sessions with 4-6 weakly interval to completely remove the tattoo. Another problem is that laser can reach tan or dark skin leaving a white patch.