Most colds in children are caused by viral infections, i.e., viral colds, and are characterized by fever, malaise, generalized muscle and joint pain, and cough and phlegm. After the child has a cold, do not be too anxious, should be timely symptomatic treatment. Viral colds are self-limiting and can be treated with antiviral and antipyretic medications, while children should take rest, feed more water and eat lightly. For children with high fever after a cold, the change in body temperature should be closely monitored, and if the body temperature is high, antipyretic drugs such as ibuprofen suspension should be used promptly, which can have a very good effect on reducing fever. Viral flu fever is a relatively common symptom, about 3-5 days after the symptoms can gradually reduce relief. If the fever persists, you should go to the hospital for further examination to rule out the possibility of complications, such as common myocarditis, encephalitis, etc. The fever persists, and further treatment is needed according to the relevant tests.