The formation of spots is a very complicated process, which is related to many factors such as age, endocrine, emotions, insomnia, medications, hormones, sunlight, wind, unhealthy body and skin. The internal factors include stress, hormonal imbalance, slow metabolism, genetic factors, etc. External factors include: long time UV exposure, poor cleaning habits and wrong use of cosmetics. In a word, it is related to pigmentation. 1. Excessive pigmentation is produced; 2. The skin cannot metabolize the pigment normally, resulting in the accumulation and formation of pigmentation. Common medical beauty spot removal methods 1, fruit acid spot removal Use high concentration of fruit acid for skin keratin peeling, prompting the aging keratin layer to fall off, accelerating the renewal speed of keratinocytes and few upper epidermal cells, promoting the proliferation of elastic fibers in the dermis, accelerating skin metabolism, and at the same time, removing some dark spots and pigmentation of acne. However, there are still many limitations of fruit acid peeling. If the spots are light in color, that is to say, for pigmentation occurring in the epidermis, fruit acid has certain effect; but if the pigmentation is deposited in the dermis, there is nothing you can do. 2.Laser spot removal Laser is able to cross the epidermis and selectively act on the deep skin tissues, with high targeting to the pigments in the skin such as melanin and hemoglobin, when some specific wavelength photons act on the skin, they will be selectively absorbed by these pigment-containing tissues into heat energy and produce photothermal effect, so that these tissues will be absorbed by pyrolysis or crusted off, thus being able to treat certain pigmented disfiguring This enables the treatment of certain pigmented disfiguring diseases. It can also stimulate the fibroblasts of the skin to enhance their synthesis ability and change the structure of collagen and elastic fibers, thus making the skin delicate and having the effect of smoothing small scars and eliminating wrinkles, thus having a wide range of uses in the field of medical aesthetics for skin beautification and treatment of some cosmetic disorders. The laser does not forcibly remove the pigment, but works through the skin, and because it is selective, it only works on the pigment particles without damaging the normal skin.