Once due to youthful indiscretion, once due to a heartfelt love, or attracted by the beautiful pattern, many people choose to tattoo, beautiful patterns are pleasing to the eye, but with the growth of age, the troubles of the tattoo increases with each passing day, join the army, employment everywhere obstructed, or bored with the pattern of excess, how to remove the tattoo and will not leave a scar? Clinical tattoos will be divided into professional, amateur, cosmetic, traumatic and medical tattoos. Professional tattoo is a tattoo artist will be one or more organic color dyes injected into the same depth of the dermis, the epidermis almost no pigment, tattoo boundaries are clear, uniform staining, the main components of the dyes used: red dyes contain mercury, yellow contains cadmium agent, green contains chromium, blue contains cobalt agent. Amateur tattoos are performed by non-professionals, more carbon or ink injected into the dermis, its injection depth varies, uneven staining; cosmetic tattooing refers to the eyebrows, tattoo eyeliner, tattoo lip line or full lip, mostly completed by hand, commonly used dyes for brown, black and red ink, ink containing iron ions or iron oxide. Traumatic tattoo is a foreign body into the skin after trauma, foreign body types, including clay, glass, metal, certain carbon-containing substances, etc., can enter the skin deep, the formation of granulomas. Medical tattoo refers to in order to disguise certain skin diseases, injuries or defects and the local implementation of tattoos in the lesion, in order to cover the original disease. Treatment program Due to various reasons, the request to remove the tattoo of the increasing number of patients, many traditional treatment methods, such as surgical excision, microdermabrasion, freezing, electrocautery, chemical etching, argon ion laser, ultra-pulsed carbon dioxide laser, etc., these methods have a certain degree of efficacy, but will leave a scar that is difficult to remove, a regenerative trouble. With the theory of cosmetic laser and manufacturing technology has been improved, making the laser has become the main means of treatment of tattoos and various pigmented diseases, Q-switched ruby laser, Q-switched emerald laser, Q-switched Nd:YAG laser and other methods can be effective in removing tattoos. Factors affecting the efficacy in clinical practice, the number of different tattoos its treatment varies greatly, ranging from several to dozens of times, and even some tattoos by dozens of treatments still can not be removed, the main factors affecting the efficacy of laser tattoo removal are: 1, the nature of the tattoo and time Professional tattoos are more difficult to completely remove compared to non-professional tattoos, the longer the tattoo, the easier to remove. 2, the color of the tattoo Compared to black and blue tattoos, red, yellow and green tattoos are more difficult to treat. 3, the composition of the pigment particles The complex composition of the pigment to the laser response varies, it is difficult to choose the type of laser and energy density, often requiring multiple treatments with a variety of lasers. 4, the number of pigment particles in the dermis and the thickness of the accumulation of tattoo pigment particles, the greater the density, the thicker the more difficult to treat. 5, the size of the pigment particles are different Some pigment particles are too large, the laser is difficult to completely crush, macrophages are difficult to engulf it. In general, because of the professional tattoo pigment particles are larger and contain organic metal dyes placed in the depths, and amateur tattoos with carbon based ink particles are smaller, and therefore more difficult to remove professional tattoos. 6, the depth of the pigment particles exist Location is deeper, the laser treatment is difficult to reach the appropriate level, most need multiple treatments. 7, the laser treatment parameters The greatest impact is the laser wavelength, pulse width and energy density, only choose the appropriate laser to play a good treatment effect. Removal of tattoos on the laser equipment and medical technology have high requirements, there are tattoo troubles of friends must choose the regular medical institutions, by professional physicians to avoid scarring and lifelong regret.