In children with upper respiratory tract infections, the cough is often dry in the early stages of the disease, with little sputum, but as the disease progresses, more sputum will appear in the later stages. The cough can be relatively infrequent or relatively frequent, and usually the cough is not too deep or difficult. In addition to cough, it is often combined with runny nose and fever. In terms of treatment, most upper respiratory tract infections usually heal on their own, as most of these conditions are viral infections and usually heal within a week. If a patient with an upper respiratory tract infection is not well for 10-14 days or has a heavy cough, consider whether the infection has reached the lower respiratory tract, such as the development of bronchitis or even pneumonia.