Labia is normally pink, labia more and more black cause of physiological factors, endocrine disorders, genetic factors, too frequent sex life, etc., into puberty due to the body’s hormone secretion increase, the female labia part began to appear pigmentation, labia gradually black, pubic hair increase, black, etc., this is a normal physiological phenomenon. Usually due to bad habits and excessive pressure lead to endocrine disorders, also prone to labia black, due to prolonged and frequent sexual life, sexual life will produce friction on the labia, friction leads to local pigmentation, vulva color is labia more and more black, usually recommended to regulate sexual life, to avoid too frequent sexual life. Due to genetic factors caused by the darkening of the labia, is not affected by the history of sexual life and reproductive history, from the beginning of the development of the color of the labia on the heavy.