If the vulvar pain and itching occur only during sex, clinically it may be caused by the following reasons: 1, the woman is allergic to sperm, and there is an allergic reaction, and the symptoms of itching occur, and most of the women will slowly relieve the symptoms of itching after sex. 2, the woman herself has a vaginal inflammation, especially the vaginal mucosa congestion and edema, and sex will aggravate the congestion and edema state, so it will lead to local pain and itching symptoms, it is recommended to go to the hospital as soon as possible to do routine laboratory tests for leukorrhea, vaginal itching and accompanied by local pain. The state of sexual intercourse will aggravate the congestion and edema, so it will lead to local pain and itching symptoms, it is recommended to go to the hospital as soon as possible to do the routine examination of the leukorrhea, in daily life there will be leukorrhea, vulvar itching and accompanied by local pain, after the leukorrhea test to understand the cause of the pathogenic bacteria, and then give the appropriate treatment.