Viral fever in children usually resolves spontaneously in 3-7 days, but it varies from case to case. Some fevers that are combined with other illnesses are difficult to resolve spontaneously, and prompt medical treatment is recommended. 1. Common cold: If it is a common infection caused by viral infection, the temperature is not too high, and children’s immunity is good, it may be able to recover in about 3 days, but if the temperature is high and the resistance is weak, it may take about 7 days to recover. 2. Influenza: Influenza is an acute upper respiratory tract infection caused by influenza virus, it may also be cured if the immunity is good, but the time will be longer, it may reach about 7-14 days, if there are heart, brain and kidney lesions, it can’t be cured by itself, and it needs to be treated actively. Children’s viral fever may have other reasons, some serious diseases can not be cured, children with fever, it is recommended that timely medical treatment, not just wait for self-cure, so as not to delay the condition.