Three-year-old baby night temperature 38 ℃, may be caused by acute upper respiratory tract infection, mycoplasma pneumonia, etc., the treatment of different diseases is different, you can take the general treatment, medication and other ways. 1. acute upper respiratory tract infection: its typical symptoms of fever, cough, nasal congestion, runny nose. 38 ℃ is a low fever, you can take physical cooling, that is, the whole body bath, if necessary, can also take a bath. If the baby’s temperature rises to 38.5 ℃ or more, you can use ibuprofen suspension and other drugs to reduce fever. 2. mycoplasma pneumonia: this kind of pneumonia is caused by mycoplasma pneumoniae infection, early usually only manifested as fever, for fever is also need physical cooling, at the same time can use azithromycin and other anti-infective, later, if there is a cough, you can use aminobromine and other drugs to stop coughing and dissolve phlegm. Three-year-old baby night temperature of 38 degrees, there are other reasons, it is recommended to consult a doctor, identify the cause, the cause of treatment, the above medication need to comply with the doctor’s instructions.