Vaginitis does not have a significant impact on menstruation. However, if vaginitis leads to an ascending infection and endometritis, it can cause an increase in menstrual flow, prolonged periods, and irregular vaginal bleeding. Therefore, if you have vaginitis, it is important to seek active treatment. During the treatment of vaginitis, it is essential to avoid sexual intercourse. Engaging in sexual intercourse can lead to cross-infection of vaginitis and make it difficult to cure. It is crucial to maintain hygiene during sexual activities and take care of the vulvar hygiene to reduce the occurrence of vaginitis.