Generally, the normal infant’s basal body temperature is between 36.5 and 37.5℃. When the infant’s body temperature exceeds the basal body temperature, parents should always pay attention to the infant’s temperature change and treat the fever in time, otherwise it will easily affect the infant’s health, and in serious cases, it will also affect the infant’s normal development, which is more harmful to the infant’s body. If the infant’s body temperature is floating back and forth around 38℃, parents should promptly take antipyretic measures, and can choose physical cooling methods to cool down, such as reducing clothing to enhance heat dissipation or warm water to wipe the forehead, neck and armpits. If the infant’s body temperature is around 39℃, which is more serious than before, it may be caused by bacterial, viral or mycoplasma infections, and physical cooling should be accompanied by timely administration of antipyretic drugs to control the development of the disease in a timely manner. If the infant’s temperature continues to be above 40°C, it is important to seek medical observation and treatment in a timely manner to avoid threatening the infant’s life and health. In addition, some infants may have a long-term low fever or a long-term high fever, which has a certain impact on the infant’s health, so parents are advised to identify the cause of the fever and take timely measures to reduce the fever in a timely manner, and if necessary, they should be hospitalized immediately for observation to prevent the infant from having a long-term low fever or a long-term high fever that brings harm.