The production of melanin is mostly related to endocrine disorders and sun exposure. The number of melanocytes mainly depends on heredity, in addition, it is also related to endocrine hormones and nutritional status. How to improve skin melanin has always been a difficult problem in beauty and dermatology. Diseases caused by melanin, such as freckles, chloasma, melanosis, etc., have become research topics in the beauty industry. Chinese medicine in the motherland believes that all the seven emotions are internal injuries, eating disorders, fatigue, kidney water deficiency and menstrual bleeding. All these will lead to diseases. In order to solve this problem, various technical methods are mainly implemented from two aspects: alleviating the formation of local melanin and promoting the decomposition and excretion of pigmentation. Commonly used anti-oxidation and anti-ultraviolet effective components are SOD, tea polyphenols, coenzyme 10, hydrochloric acid, tocopherol, evergreen, angelica, scutellaria, aloe and so on. Anti-free radicals similar to SOD can resist ultraviolet radiation and slow down the formation of pigmentation. At present, the feedback information of laser therapy is satisfactory. Go to Yiqianyuan Beauty and Plastic Surgery Hospital for consultation. I hope it helps you.