Condition analysis: There are many reasons for the darkening of a woman’s private parts, but sexual life is indeed an important factor. After sexual stimulation, local capillaries stretch and become thinner, and blood oxygen exchange has no time to return hemoglobin deposition, aging. , coupled with the gradual centripetal deposition of melanin, causing the areola and labia to become darker and darker. In fact, the color of the female genitals is affected by the melanin deposition itself, and this pigmentation is also related to female hormones. That is to say, the vagina of a woman has not developed since childhood, so the entire external genitalia is covered by the labia majora, and the skin of the vagina is the same color as the skin of other parts. After the female growth period, due to the influence of hormones, hair will grow on the female perineum, and the labia minora will be more prominent than the labia majora. At this time, the color of the vagina will also begin to deepen. Suggestions: For women who have been married for many years, the color of the vagina becomes darker because sexual life increases hormones in the body, causing the color of the vagina to become darker. The longer the sexual life is, the darker the color will be, but this is normal.