The phenomenon of women often have low fever may be physiological reasons, there may also be pathological reasons, such as viral colds, autoimmune diseases, and so on. 1. Physiological reasons: some women may have low fever before menstruation, ovulation and other special periods, which is a normal phenomenon, and can be returned to normal after the end of the general period. 2. Pathologic causes: (1) viral cold: due to viral infection and other pathogens that lead to significant inflammatory response in the body, which may appear low fever, cough and other typical clinical symptoms. (2) autoimmune diseases: if the body suffers from rheumatic fever and other autoimmune diseases, there may also be frequent low fever phenomenon. If the above symptoms occur and physiological causes are excluded, it is recommended to identify the cause of the disease and actively cooperate with doctors for treatment.