Vulvar pain during coitus is often caused by the following reasons: First, there is inflammation of the vulva, resulting in local mucosa congestion, edema, so coitus will cause pain. Second, may have entered the perimenopause, ovarian function in the gradual decline, so the level of estrogen declines, resulting in a decrease in vaginal secretions, coitus feel dry, causing pain in the vulva and vagina. Third, it may be caused by vulvar malnutrition, vulvar malnutrition will lead to vulvar local skin elasticity decreased significantly, and will lead to the vaginal opening atrophy, so coitus will be painful, it is recommended to go to the hospital as soon as possible to give a checkup, and give treatment.