The main cause of coughing in children after a fever is the change from an acute upper respiratory infection to acute bronchitis, which is often very common. In the early stages of the disease, children often have high fever, sore throat, dizziness and other symptoms of colds, and as the disease progresses, children’s fever will subside in about 2-3 days. However, the cough tends to worsen gradually and is often accompanied by phlegm. In this case, it is necessary to carry out timely treatment to resolve phlegm and relieve cough, such as the application of compound fresh bamboo lee oral solution, or ambroxol oral solution to resolve phlegm and relieve cough, and most of the cough after fever will be improved in about 1 week.