The darkening of female private parts is more common, but mostly not as a pathological phenomenon, usually related to hormonal changes, but also may be due to inappropriate clothing, excessive friction, most cases do not need to care too much, and no special treatment. 1, after puberty: after women enter puberty, the reproductive system gradually develop and mature, the ovaries begin to secrete estrogen, estrogen has the role of promoting melanocyte production, so Adolescent women will gradually have nipples, vulvar pigmentation phenomenon; 2, pregnancy factors: female pregnancy after the pro-melanocyte and estrogen secretion increased, so that pregnant women’s face, nipples, abdominal white line, vulvar pigmentation than before pregnancy, can gradually fade after delivery; 3, tight clothing friction stimulation: wearing tight clothing such as thongs, tight pants, etc., easy to compress the blood flow or excessive action Friction skin, resulting in melanin deposits, will also make the private parts dark. Women daily conditioning, avoid spicy and stimulating food, eat more fruits and vegetables containing vitamins, such as strawberries, saints fruit, purple cabbage, kelp, etc., can also eat more beans and soy products such as tofu, soy milk, etc., which is rich in isoflavones with strong antioxidant capacity, which has certain benefits for the skin. Pay attention to wear less tight pants and keep the vulva clean and hygienic.