Nine-month-old babies with fever and no other symptoms, if the fever is low, can be temporarily observed, dynamic monitoring of body temperature, give physical cooling. If the fever is high, it is necessary to consider bacterial or viral infection, and give anti-viral or anti-bacterial infection treatment. Nine-month-old baby if the phenomenon of fever, no other symptoms, and is low fever, can be temporarily observed, it is recommended to first use physical therapy methods, increase ventilation, reduce clothing, cold compresses, warm water baths, alcohol baths and so on. If the fever is high, or the fever recurs after the low fever subsides, it may be caused by viral infection, or bacterial infection, and should be treated for the cause. 1. Viral infections: these infections are mainly symptomatic, oral ibuprofen, acetaminophen and other antipyretics when the baby has a high fever. 2. Bacterial infections: this type of treatment is mainly in the fever at the same time need to use effective antibiotics (such as cefadroxil granules, azithromycin granules, etc.) for treatment. There may also be other causes of fever in babies, such as rheumatic fever, tumors, etc. When recurrent fever occurs, it is recommended to consult a doctor in time. The above drugs need to be standardized and reasonably used under the guidance of professional physicians and pharmacists.