The fever in children generally heals in a few days, mainly depending on the cause of the fever, the severity of the disease and the individual’s constitution, and should be analyzed on a case-by-case basis, not just in general. If the fever is caused by a viral infection and the child’s own resistance is weak, the fever may take 3-5 days or even 7 days to recover. During the course of fever, it is recommended that the child drink more hot water and combine with physical cooling to treat the symptoms. If the child’s body temperature exceeds 39°C, consider taking antipyretic drugs and observe closely afterwards. If the fever is caused by a bacterial infection, antibiotics can be applied for targeted treatment, and the body temperature can gradually return to normal within 3 days, but the specific fever reduction time varies from person to person. Therefore, when children have fever symptoms, parents are advised to take their children to the pediatric internal medicine department of a regular hospital for blood tests to clarify the cause and treatment under the guidance of a professional doctor.