Itching of the vulva during menstruation is a sign of allergy to sanitary napkins or lack of proper hygiene during menstruation, which may cause itching of the vulva. Since there is no vaginal medication during menstruation, you can wash your vulva. It is recommended to buy a lotion from a pharmacy, such as Gynecare or Jelqing, and wash your vulva with 1:10 water. Sanitary napkins should be changed every 4 hours and underwear should be changed every day to clean and disinfect them, which can avoid and relieve the symptoms of vulvar itching. If vulvar itching is still present after menstruation, you should go to the gynecology department for a vaginal discharge test to rule out the presence of vaginitis. If vaginitis is present, vaginal plugs can be administered according to the results of the test and intercourse is prohibited during the plugs to avoid cross-infection.