The most common cause of vulvar itching is vulvovaginitis. Since it is during menstruation, commonly used medications for vulvovaginitis, such as lotions can be used externally to relieve the itching. Based on the approximate manifestations to determine roughly, what nature of vulvovaginitis is likely to be, you can use the appropriate amount of ointment to apply externally. For example, if it is mycobacterial, you can use clotrimazole cream to apply externally, if it is trichomonas, you can take oral metronidazole tablets or ornidazole tablets to treat. During menstruation, you should also keep the vulva clean and dry, wear more loose underwear, keep the local dry and breathable, which is conducive to relieving the symptoms of vaginitis and relieving the symptoms of vaginal itching.