The reasons for vaginal itching after sex are as follows: 1, after sex local friction caused by edema, the mucous membrane is more sensitive, so there is the problem of itching, this situation can be observed first without treatment. 2, the woman herself suffers from mycosis fungoides or trichomonas vaginitis, the usual symptoms are not obvious, the secretion of a large amount of liquid after sex, the pseudo-filamentous yeasts or trichomonas reproduction accelerated, the vaginal itching. You can use mycotoxin vaginal effervescent tablets, or metronidazole vaginal effervescent tablets for treatment. 3, do not pay attention to sexual hygiene, there are certain germs on the male penis, not cleaned before sex, sex caused by the female vagina infected with pathogens, thus causing itching, you can use local metronidazole vaginal effervescent tablets for treatment. 4, the female in the sex of male secretions have an allergic reaction, pay attention to cleaning the The vulva, itching serious can take oral anti-allergy drugs for treatment.