Women’s lower skin is black is a normal physiological phenomenon, because women’s ovarian function after maturity will be the periodic secretion of estrogen and progesterone, vulvar skin in the role of estrogen will appear darker than the other parts of the body, the color of the skin to be darker, this is a normal phenomenon. However, there is one thing to pay special attention to, if the local skin appears similar to the color of melanin, clinically it may be a pathological state, may be caused by certain skin diseases, it is recommended to go to the hospital to give a timely examination, and then decide whether to give treatment. After puberty, vaginal secretions will increase, so women should keep the vulva locally clean. If the skin of the vulva becomes itchy, rough, flushed or broken, it is abnormal and should be examined promptly.