Nd yag laser for skin tightening can be used for skin treatment. Treatment time depends on the form, size and location of the lesions as well as the skin type. Small red vessels can usually be removed in only 1 to 3 sessions. Hair removal: In general, patients have 2 to 6 treatments, approximately every 4 to 6 weeks. Tattoo removal:The color of the tattoo and the depth of the pigment influence the duration and the outcome of the laser treatment for tattoo removal. Onychomycosis Gupta AK, Simpson F. Device-based therapies for onychomycosis treatment. Skin Therapy Letter. 2012; 17(9).The term YAG laser is usually used for solid-state lasers based on neodymium-doped YAG (Nd:YAG, more precisely Nd3+:YAG), although there are other rare-earth-doped YAG crystals, with ytterbium, erbium, thulium or holmium doping (see below). YAG is the acronym for yttrium aluminum garnet (Y3Al5O12), a synthetic crystal material which became popular in the form of laser crystals in the 1960s.YAG lasers are in many cases bulk lasers made from discrete optical elements. However, there are also monolithic YAG lasers, e.g. microchip lasers and no planar ring oscillators. Nd:YAG lasers can be diode pumped or lamp pumped. Lamp pumping is possible due to the broadband pump absorption mainly in the 800-nm region and the four-level characteristics.