Vulvovaginal itching after coitus may be caused by the lack of hygiene during coitus, which leads to localized infection of pathogenic bacteria in the vagina and triggers the development of vaginal inflammation. For example, Trichomonas vaginitis is caused by the male bringing Trichomonas vaginalis into the woman’s vagina during intercourse. It can also be caused by an imbalance in the vaginal flora environment during intercourse, resulting in a proliferation of mold or an increase in the number of cluck cells that cause inflammation. It is also possible that the woman herself has cervical inflammation, just due to the stimulation of coitus leads to cervical local inflammation aggravated, resulting in the appearance of abnormal leukorrhea, flow out of the vagina will also have symptoms of vulvar itching. It is also possible that after the end of coitus, women’s vulva is infected by pathogenic bacteria and cause vulvovaginitis, but this time will be accompanied by redness and swelling of the vulva, but there will be no abnormal leukorrhea.