There are several reasons for menstrual fever: First, women are already suffering from gynecological diseases, such as endometritis, pelvic inflammatory disease, etc., which can cause fever, mainly because the ability to resist the vulva during menstruation is reduced, when not paying attention to vulvar hygiene will cause bacterial infection, which may cause fever during menstruation. Secondly, in addition to gynecological diseases, it may be because the body’s immunity is relatively low, because during menstruation women are relatively weak, there will be the invasion of viruses, which can cause the symptoms of a cold, fever. Third, is not pay attention to keep warm when menstruation, cold and fever, this time to take physical fever, such as the use of warm water to wipe the forehead, armpits and other parts of the temperature down.