The common causes of vulvar itching after menstruation include: 1. If you have suffered from trichomonas vaginitis or mycotic vaginitis in the past, it often leads to the recurrence of the original disease or aggravation of the disease during menstruation, resulting in obvious vulvar itching after menstruation. 2. Poor quality of toilet paper or sanitary napkins used during menstruation, resulting in poor menstrual hygiene, causing gynecological inflammation, or allergic reaction to the vulva. 3. not changing underwear and washing the vulva in time after the end of the menstrual period, resulting in foreign body stimulation of the local area and causing itchy symptoms. In the menstrual period, pay attention to wear loose and comfortable, breathable underwear, diligent replacement of sanitary products, timely cleaning of the vulva after the menstrual period, and active treatment of gynecological inflammation.