If the baby has a fever, generally the most common is caused by infection, pay attention to observe the performance of other symptoms, pay attention to check, there is no throat infection, pay attention to observe the symptoms of the respiratory system, including runny nose, sneezing, cough, sputum, digestive system symptoms, including diarrhea and other conditions, usually pay attention to avoid catching cold, to prevent colds, Improve the relevant examination, and thus the corresponding treatment.