The following reasons are often seen clinically: 1. The pelvic cavity is congested during the menstrual period, so women who are more sensitive will have a feeling of pain in the vulva, which will be relieved by bed rest. 2. 3. Because of the varicose veins in the vulva, the varicose state will be aggravated during menstruation, and the sensation of vulvar pain will appear. Therefore, if you have vulvar pain when you have your period, it is recommended that you go to the hospital after your period for a corresponding examination to find out if you have vulvar varicose veins or if you have pelvic inflammatory disease, and according to the results, you should give the appropriate treatment.