Laser ya Q-Switched Nd: YAG imawunikira kuwala ndi kutalika kwake kwamphamvu kwamphamvu kwambiri, chifukwa chake kuwala kumalowa mu minofu kokha kwa nanosecond.Kuwala kumatengedwa ndi mtundu wa pigmentation ndipo kumapangitsa kuti pakhale kuphulika nthawi yomweyo, ndiko kuphulika kwa kuwala.Tizidutswa ta pigmentation timaphwanyika kukhala tizidutswa tating'ono ting'onoting'ono, tinthu tating'ono ting'ono ting'onoting'ono tomwe timatha kuzunguliridwa ndi phagocyte kenako ndikuchotsedwa ndi ma lymphatic system.