Melanosis is a manifestation of the skin caused by the deposition of melanin under the skin or in the epidermis or dermis. In clinical treatment, first of all, you should avoid strong sunlight exposure, especially when you go out in spring and summer, you should apply some shading agents, such as 5% carbon dioxide or 5% para-aminobenzoic cream, etc. For specific treatment, topical depigmentation agents, such as 3% hydroquinone cream, corrosive or destructive therapies, should always be operated under experienced medical personnel, and if the treatment is inappropriate, it will easily cause scarring or hyperpigmentation. Therefore, it is recommended to go to the dermatology department of the regular hospital for consultation and treatment after the appearance of melanin spots to avoid delays.