If the vulva is particularly itchy locally after intercourse, and there is no plan to get pregnant, you can wash the vulva and then apply mometasone ointment or paresone ointment locally for appropriate treatment. This situation may be caused by the following reasons: a. Allergy to semen, so there is an allergic phenomenon, through the use of Piperisone or mometasone ointment anti-allergy, itching symptoms will be significantly reduced. It is recommended that these patients use condoms during intercourse to block the contact between semen and vaginal mucosa and cause allergic phenomena. Second, the coitus did not pay attention to hygiene, leading to pathogenic bacteria into the vagina, so it will cause candida infection, in the clinic will lead to special itching, the main feature is that the vaginal secretion is like tofu dregs, after the routine laboratory test can be confirmed, and then give the treatment, the itching symptoms will be reduced.