When a child has a fever after being discharged from the hospital with pneumonia, it is usually common that the condition has not been effectively controlled and there is a recurrent or cross-infection that re-induces symptoms of upper respiratory tract infection. You can drink more water, pay attention to rest and take vitamin supplements. Take oral pediatric cold and flu granules, which can relieve and treat various symptoms caused by cold and flu. If the body temperature is >38.5℃, you can give ibuprofen and acetaminophen to reduce fever, which can quickly reduce fever. You can also take oral Chinese medicine such as Antelope Root Granules and Pu Di Lan Anti-inflammatory Oral Liquid to clear the heat and detoxify the toxin. If the fever persists and is accompanied by coughing and shortness of breath, hospitalization is recommended.