Itching of the vulva may occur during menstruation when the flow of menstrual blood causes contamination of the vulva. It can be improved by buying gynecological cleansing, disinfecting and antiseptic lotions for washing the vulva whenever possible. If you are allergic to sanitary napkins during menstruation, you may experience vulvar itching. Change the brand of sanitary napkins as much as possible to alleviate vulvar itching caused by allergy. For example, during menstruation due to the lack of timely washing of the vulva, underwear is not changed in a timely manner, sanitary napkins more than 4 hours without changing once. As long as the menstrual blood is contaminated, it can also cause vulvar itching, so as far as possible to change the underwear every day, sanitary napkins 2~4 hours to change once, so as to avoid the occurrence of vulvar itching caused by cross-infection. After the end of menstruation, if it persists, it is necessary to test the secretion, according to the situation is to carry on the vaginal plug treatment.