Melasma is the most important topic of concern for women who love beauty, and we all know that its causes are related to endocrine disorders and sun exposure. In addition to the above-mentioned causes, there are also causes that are not familiar to everyone. In our daily life, we also need to pay attention to the following matters: First: do not take contraceptive drugs and use other contraceptive methods instead. Second: do not overuse antiseptic soap or cleanser, the secretions of bacteria present on the surface of the skin, the epidermis is a protective effect, the formation of a weak acidic lipid layer on the surface of the skin. After the dysbiosis, it will cause a change in the PH value of the skin, the skin defense function is reduced. Third: Don’t use cosmetics indiscriminately, the use of improper cosmetics will provoke the proliferation of melanocytes and aggravate chloasma. Fourth: Don’t take too much photosensitive food or medicine, which will aggravate the symptoms after sunlight exposure. Fifth: Keep your mood relaxed, be cautious of anger, and be “heartless”. Sixth: try to ensure regular communication between husband and wife. There are various classifications of melasma, and the classification method recommended by the Pigmentology Group of the Dermatology Branch of the Chinese Medical Association is according to the location of melanocytes: epidermal; dermal, mixed, and indeterminate. The efficacy of melasma has a lot to do with the clinical classification of melasma, some can be eradicated and some can only be lightened!