The laser-washing tattoo machine utilizes the selective photothermolysis of the laser to cause the high energy generated by the laser to be absorbed by the pigment particles, causing it to swell and rupture, and at the same time, part of the pigment particles are removed from the epidermis to the body surface, and most of them are giant. The phagocytes run to the lymph nodes or are re-phagocytosed by macrophages. The surrounding normal tissue does not form any damage because it does not absorb laser light of a fixed wavelength.
