Darling does not have cold symptom how is sudden fever to return a responsibility

The baby has no cold symptoms Sudden fever may be caused by bacterial infection or viral infection, but it cannot be ruled out that it is caused by bronchitis, pneumonia and other diseases. When the baby has a fever that does not exceed 38.5 degrees, it needs to be cooled down physically. For babies whose temperature is above 38.5 degrees, it needs to be treated with antipyretic drugs.