Generally speaking, the spots on the face can be divided into two types: congenital and acquired. For example, birthmarks, coffee-milk spots, Becker’s spots, melasma, nevus of Ota and nevus pigmentosus are more related to congenital genetics, so it is difficult to prevent them from arising or fading away by preventive measures. These congenital pigmentation spots are usually solved by regular laser treatment. The more preventable spots are mostly formed later in life, such as freckles, melasma, sun spots, age spots (seborrheic keratosis) and post-inflammatory hyperpigmentation. Therefore, it is important to identify and diagnose the type of spots first, so that the treatment can be done with half the effort. Generally speaking, the process of melanin formation can be divided into three stages: the first is the melanocyte activation period; the second is the melanogenesis period; and the third is the melanin distribution period. 1, melanocyte activation period: such as ultraviolet radiation, external friction, use of improper cosmetics or post-inflammatory reaction, keratinocytes will produce certain signal factors and cell hormones to stimulate melanocytes. 2.Pigmentation period: The subsequent process will activate tyrosine to produce melanin in the black pigment cells. 3. Melanin distribution phase: After four stages of maturation, melanosomes are transmitted to the surrounding keratinocytes through the synapses of melanocytes. The relationship between melanocytes and keratinocytes is inseparable from the relationship between the formation and deterioration of acquired spots and UV rays. UV radiation not only promotes melanocyte division, but also activates the tyrosine in them to produce more melanin to the surface of the skin. After a long period of chronic sun exposure, this excess melanin will easily produce uneven distribution and lead to dullness and blemishes. In addition, endocrine changes, such as menstrual disorders, menstrual cramps, pregnancy or menopause, use of oral contraceptives or adrenocorticotropic drugs, uneven nutrition, smoking, stressful life, heavy metal poisoning, use of unsafe cosmetics and poor physical condition, etc., are also possible causes of skin dullness and blemishes. Therefore, the formation of blemishes is not only a single factor, how to minimize the triggering factors is to be considered as a whole. Whitening and blemishes are three essential lessons 1. The skin is the external indicator of the body condition. In ancient Chinese medical texts, it has been mentioned that: heart, its Hua in the face; liver, its Hua in the claws; spleen, its Hua in the lips; lung, its Hua in the hair; kidney, its Hua in the hair; clinically, we often see the situation that the skin is related to the internal organs. So keep your body healthy and happy, sleep well and avoid overwork and frequent late nights, avoid long-term emotional tension and excessive stress, as well as away from alcohol and tobacco and proper exercise, are the only way to keep the skin in a healthy state and normal metabolism. 2, the right way to take care of your skin Everyone’s skin is unique, and each person’s skin has its own inherent qualities. Whether it is maintenance products or cosmetics, to put it bluntly, are a mixture of many chemical ingredients, the appropriate choice of some maintenance products for their own skin type, it is possible, but too much use of a wide range of cosmetics, but sometimes may add to the burden of the skin. 3, nutritional balance and more intake of food containing antioxidant effect In addition to a balanced diet without excess, not partial food, less high sugar, high salt, high color and high stimulation of food, such as a variety of natural fruits and vegetables, garlic, vitamins A, C, E, carotenoids (such as beta-carotene, lycopene), as well as flavonoids (such as soy isoflavones), grape seeds before anthocyanins and polyphenols (such as green tea polyphenols, white rutin) and so on. …… and so on, are quite good antioxidant food, moderate intake of the body and skin health definitely have positive help.