The reasons why women have a lot of gray hair on both sides include physiological factors such as aging, pathological factors such as mental factors, albinism, vitiligo and so on. 1. Age: When the patient grows older, the tyrosinase activity will gradually decrease, and finally lead to the formation of melanin is insufficient, so as to produce gray hair. 2. mental factors: when the patient has depression, neurasthenia and other mental illnesses, these diseases will trigger endocrine disorders, resulting in reduced melanin production, and thus the appearance of white hair. 3. albino: due to hereditary and other congenital factors triggered by less melanin formation, so the white hair. 4. Vitiligo: because of infection, ultraviolet light and other acquired factors lead to the patient’s melanin production is insufficient, will also appear a lot of white hair. The woman has a lot of white hair on both sides may also have other reasons, it is recommended that the patient go to the hospital in time to confirm the diagnosis, clear cause of the disease, under the guidance of the doctor standardized treatment.