First, smoking and drinking, often staying up late, computer radiation? Smoking and drinking, staring at the computer for a long time, reversing the schedule of work and rest, or insufficient sleep for a long time can all promote the formation of chloasma.

Suggestion? : smoke less and drink less, avoid facing the computer for a long time and staying up late often, and keep enough sleep.

Second, do not take sun protection measures? When a large amount of ultraviolet rays directly irradiate human skin, in order to prevent skin cells from being oxidized, the human body will secrete a large amount of melanin for protection, resulting in pigment precipitation and black spots. Ultraviolet irradiation can activate tyrosinase activity, enhance the proliferation and activity of melanocytes, accelerate the synthesis of melanin and cause facial pigmentation.

Suggestion? People who are prone to chloasma should try to reduce going out in the sun or strengthen sun protection, such as holding an umbrella or applying sunscreen, and avoid exposure to the sun from 10 to 4 pm (especially in summer). two

Abuse of bad cosmetics: Some women have used a lot of cosmetics for years. Cosmetics contain preservatives, fungicides, metals, pigments, spices and other harmful ingredients. Long-term use will cause a series of skin diseases, and chloasma is one of them. The consequences of long-term use of bad cosmetics are more serious.

Suggestion? Women should wear as little makeup as possible, or choose cosmetics containing natural or organic ingredients.

Fourth, too much psychological pressure? Under long-term stress, the metabolism of human body will slow down, and the skin needs insufficient nutrition, but the pigment cells will be more active, and the longer the chloasma, the more.

Suggestion:? Keep a good mood, avoid anxiety and sadness, and choose effective decompression measures, such as exercising, listening to music, and talking to someone. All contribute to the prevention and treatment of chloasma.

5. pregnancy:? Women are prone to chloasma after 3-5 months of pregnancy, so it is also called "pregnancy spot". The reason of facial pigmentation may be that estrogen combined with progesterone stimulates melanocytes, and progesterone promotes the transport and diffusion of melanosome and increases the production of melanin.

6. Suffering from chronic diseases: Most women suffering from reproductive system diseases such as irregular menstruation, dysmenorrhea, adnexitis and infertility will have chloasma, which is mainly caused by endocrine disorders. In addition, chronic gastrointestinal diseases, hyperthyroidism, liver diseases, tuberculosis and tumors can also cause chloasma.

Suggestion:? We should actively treat the primary disease.

Seven, long-term use of certain drugs: Chlorpromazine, phenytoin sodium, hibernating spirit and spironolactone can all induce chloasma, and the specific mechanism is not clear. In addition, oral contraceptives are also prone to chloasma. Among women who use oral contraceptives, the incidence of chloasma is about 29% whether they take it continuously or intermittently.