Minor triple sun does not cause chloasma. It is caused by factors such as ultraviolet radiation, endocrine disorders, race and heredity. 1. Ultraviolet radiation: long-term ultraviolet radiation can activate the function of skin pigment cells and increase the release of inflammatory cytokines, leading to an increase in the activity of tyrosinase in skin cells and promoting the synthesis and transportation of melanin, which will trigger chloasma. 2. Endocrine disorders: endocrine disorders such as changes in sex hormone levels (estrogen and progesterone), endocrine disorders in male patients will lead to abnormal secretion of androgens, such as excessive secretion of androgens will stimulate melanin cells to secrete melanin particles, while abnormal increase of progesterone in female patients can promote melanin particles’ transportation and proliferation, which will lead to the emergence of chloasma. 3. Race and heredity: patients with chloasma have a higher chance of having chloasma in their offspring. Minor Triple Positive is the immunological indicator of hepatitis B virus in chronic hepatitis B patients or hepatitis B virus carriers. Hepatitis B virus does not cause direct damage to the skin, so hepatitis B does not cause melasma. Therefore, the minor triple sun does not cause melasma. If you notice the appearance or aggravation of melasma, please ask the relevant professional doctor for advice and follow the doctor’s instructions.