Many adult women experience darkening of the labia, only to varying degrees. There are many factors that can cause dark labia, including genetic factors, stimulation of vaginal secretions and long-term friction, and too frequent sexual intercourse. Genetic factors: For some women who are born with darker skin tone, the color of labia will be slightly darker. Stimulation of vaginal secretions: If abnormal vaginal secretions occur without timely medical treatment, these abnormal vaginal secretions will stimulate the labia for a long time, resulting in darker color of labia due to melanin deposition. Long-term friction: Some women also like to wear tight thongs and tights, and their pussy and pants will constantly rub together, which may also be the cause of dark labia. Too frequent sex life: too frequent sex life can also stimulate melanin deposition, which can lead to dark labia. Generally speaking, if only the labia are black in color, there is no need for treatment. In daily life, just pay attention to keep the pubic area clean and try to wear cotton, breathable underwear to keep the intimate area healthy. However, if it is accompanied by other uncomfortable symptoms, you must go to a regular hospital for gynecological examination in time.