Itching of the vulva after sexual intercourse indicates that it is due to inflammation. There are two possibilities: 1, the woman herself has vaginitis, like moldy vaginitis, bacterial vaginitis, and trichomonas infection, which can cause this condition. In addition, if you are allergic to condoms, it may also cause symptoms of vulvar itching.2. Sexual partners have circumcision, foreskin scaling and so on. This category of men usually carry bacteria on their genitals, and if they don’t wash them well before having sex, they will bring these bacteria into women’s bodies, which will lead to symptoms and cause inflammation, which should be treated in time.