There are several reasons for vulvar itching after menstruation: Firstly, during menstruation, there is no strengthening of vulvar localized care, which leads to pathogenic bacterial infections, and after menstruation, such bacteria multiply a lot, so it will lead to vulvar itching symptoms, the most common one is Candida infection, which is often accompanied by tofu dregs-like secretion, and the necessary treatments can be given after clear diagnosis in the laboratory examination. Secondly, not changing sanitary napkins regularly during menstruation can lead to localized inflammatory reaction of the vulva, which can also cause itching. It is recommended to change sanitary napkins during menstruation, once itching occurs, you can apply dermatophyte for corresponding treatment, and it is recommended to keep the vulva clean. Thirdly, it may be caused by allergy to sanitary napkin, in the localization of vulva, you will see very clear boundaries of red papules or flushing, edema phenomenon, you can apply mometasone for treatment.