The baby’s body temperature of 37.3℃ is low fever, parents need not worry, it is recommended to cool down through physical methods. Under normal circumstances, the baby’s body temperature range is 36.0℃-37.0℃. Because the baby’s thermoregulatory center is not yet well developed, it is easily affected by the external environment, for example, the room temperature is too high, the baby wears too many clothes, after eating, after strenuous exercise, etc. can lead to a slight increase in the baby’s temperature, but fluctuations do not exceed 1 ℃. If the baby’s body temperature is 37.3℃, and there is no combination of cough, runny nose, loss of appetite, depression and other symptoms, parents can try to lower the room temperature, open the window to promote air circulation, or give the baby physical cooling, using warm water to wipe the forehead, paste antipyretic post, etc., and observe the baby’s temperature change. If the temperature continues to rise above 38.5°C, you need to take fever-reducing drugs such as ibuprofen suspension orally. Parents also need to take good care of their babies when they have a low fever, feed them water regularly, and pay attention to keeping them warm to avoid catching a cold.