Menstrual fever is most commonly caused by bacterial-viral infections, with infections of the respiratory tract as well as the genital tract being the most common. The main reason is that women’s resistance decreases during menstruation, which can easily lead to infections. The respiratory tract is mainly due to the high bacterial and viral content in the air and the presence of many colonizing pathogens in the mouth, which can lead to infections when resistance decreases and manifest discomfort such as fever. Infections of the reproductive system are also likely to occur because blood is a good culture medium for pathogens. In order to avoid infection, it is necessary to pay attention to proper exercise, reasonable diet, ensure sufficient sleep to avoid further decline in resistance, maintain local cleanliness and hygiene, change underwear and sanitary napkins regularly. In case of fever during menstruation, you can take more physical cooling, such as warm baths and warm water wipes on the areas where large blood vessels pass, such as bilateral neck, armpits and groin area.