Melasma is a kind of skin pigmentation spot that mostly occurs in the face of middle-aged women. There are many kinds of lasers available for clinical treatment of melasma, among which Q-switched laser, picosecond laser and intense pulsed light are the most common. It is recommended to communicate with dermatologists to determine the most suitable treatment method for your situation.1. Q-switched laser: Q-switched laser includes many kinds of lasers, including Q-switched 694nm ruby laser, 755nm emerald laser, and 1064nm yttrium aluminum garnet crystal laser. The photothermal effect of laser can selectively destroy pigment particles and promote pigment metabolism so as to reduce pigmentation on the skin surface. q-switched laser has an efficiency of about 50% in treating melasma, and some patients will have increased pigmentation after treatment, so it is recommended to treat melasma during the stable period, and at the same time to combine with medication, such as oral vitamin C, vitamin E or tranexamic acid; 2. picosecond laser: it refers to each It uses the principle of selective thermal absorption to apply larger energy to the target chromophores in the skin in a very short time, crushing melanin and making it easier to be removed by macrophages. Compared with Q-switched laser, there are less side effects of pigment deepening after treatment, so the safety of picosecond laser for melasma treatment is relatively high; 3, strong pulsed light: that is, photorejuvenation, which is often said in the beauty industry, is essentially the same as ordinary light, and has better effect on treating epidermal melasma, but not ideal for mixed or dermal melasma. Strong pulsed light can take into account a variety of therapeutic effects, with multiple effects such as blackening, reddening and skin rejuvenation, and is a relatively safe and efficient non-ablative photoelectric treatment, which rarely causes complications under standardized operation.