Patient's question:
NoDoctor's answer:
There are many reasons that can cause the vulva to darken, but sexual activity is indeed a significant factor. After sexual stimulation, local capillaries stretch and narrow, and blood oxygen exchange doesn't return in time, leading to the deposition of hemoglobin, aging, and gradual centripetal accumulation of melanin, resulting in increasingly darkened colors of the areola and labia. In fact, the color of a woman's vulva is influenced by the natural deposition of melanin, and this pigment deposition is also related to female hormones.