Itching after menstruation may be caused by the following reasons: First, during the menstrual period did not strengthen the local care of the vulva, so that the vulva local formation of inflammatory reaction, resulting in itching, the most common is Candida albicans infection, not only will cause the local itching of the vulva, but also lead to a large amount of tofu dregs of vaginal discharge, accompanied by the localization of the redness and swelling of the vulva, it is recommended to pass the routine leukorrhea laboratory tests for a definitive diagnosis, and then It is recommended to give the appropriate treatment after a clear diagnosis through routine tests of leukorrhea. Secondly, it may be caused by allergy to sanitary napkin, when allergy to sanitary napkin, there will be obvious red papules with clear boundaries on the vulva, which is caused by allergy, and can be treated by applying dermatophyte or mometasone ointment locally, which will reduce the symptom, and it is recommended that we don’t eat acidic and spicy food during the period of illness.