Melasma is a common facial skin disease, commonly known as butterfly spots, the performance of face for the Department of pigmented spots, symmetrical distribution, irregular shape, the size of uncertainty, different colors, mainly in the eyes around the cheeks, I zygomaticus weeks, etc., affect the appearance of patients with the United States, generally do not have symptoms, but the treatment is very difficult.
Many factors can cause chloasma, if pregnant women will be 3-5 months, until after the delivery began to dissipate, called chloasma of pregnancy; some women oral contraceptives for a period of time there will be Malacosoma Grouper; some women suffer from female genital diseases, while also associated with chloasma. Patients such as scientific experiments to prove that its chloasma and women suffering from hormone to stimulate the melanocytes to promote pigmentation related. However, not all chloasma with the emergence of sex hormones, some women suffer from some chronic diseases will also appear when Melasma, such as tuberculosis, cancer, chronic liver disease, and so on. Moreover, certain endocrine abnormalities of the disease, malnutrition or unreasonable, such as a lack of vitamin A, C, E, niacin and some trace elements such as, or excessive ultraviolet radiation will cause chloasma. Some scholars have pointed out that the spirit of the nerve factor is also one of the reasons for chloasma, such as non-life laws, such as lack of sleep. In short, chloasma occur for a variety of reasons, the exact cause is not entirely clear.
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