One year and three months old baby fever 38.3 ℃, need to carry out physical cooling, and continue to monitor the temperature, if necessary, the use of ibuprofen to reduce fever, at the same time need to clarify the cause of fever (such as respiratory infections, etc.), and treatment. Fever is a common symptom in pediatrics, can be seen in a variety of diseases, such as respiratory infections, etc., when the body temperature is 38.3 ℃, in a febrile state, there can be respiratory and heart rate increase, general discomfort, etc., can be used to wipe with warm water and other methods of physical cooling, some of the babies are still sustainably elevated temperatures, more than 38.5 ℃, the need for antipyretic medication (eg, ibuprofen or acetaminophen) symptomatic antipyretic. At the same time need to identify the causes of fever, such as urinary tract infections, the baby can be accompanied by urinary pain and other symptoms, improve the urine routine examination can be seen in the elevation of leukocytes, the need to use antimicrobial drugs (such as cefaclor) anti-infective treatment. Can also be seen in Kawasaki disease, can appear the above phenomenon, after the diagnosis is clear need to use gammaglobulin and other treatment. All of the above medications should be used under the supervision of a physician, and it is recommended that the patient be seen by a specialist for evaluation of treatment.