Itching of the vulva during menstruation can be caused by a number of factors. First, when menstruation, due to the shedding of the endometrium, menstrual blood is discharged through the vagina and the vulva, which can cause vulvar itching and vaginitis due to the contamination of menstrual blood. When sanitary napkins are not frequently changed or not changed for a long time, the vulva itching can also occur due to not changing the sanitary napkins. The itching of the vulva can be caused by the lack of timely cleaning of the vulva every day, which can lead to inflammation of the vulva. The resistance of the menstrual period is relatively lower, this time if you do not pay attention to personal hygiene, and will cause cross-infection, will also cause the symptoms of vulvar itching. It is advisable to go to a pharmacy and buy some lotion, such as gynecologic cleanser or cleansing lotion or red nucleus lotion, either 1:10 to water to wash the vulva to relieve the symptoms of vulvar itching. If the itching persists after menstruation, you should go to the gynecologist for a discharge test and vaginal medication according to the situation.