Coughing after fever may be seen in upper respiratory tract infections, bronchitis and lung infections. Upper respiratory tract infection usually has antecedent symptoms, such as nasal congestion, runny nose, sneezing, sore throat and coughing after the patient gets cold or exertion, and viral infection is more likely. It is recommended to give anti-cold medicine treatment, such as Lotus Clear Fever Capsules, 999 Cold and Flu Spirit, Sensitive Health, etc., and drink more water and take more rest to help get better. In bronchitis, the patient shows cough and sputum after fever, and sometimes dry rales or wet rales can be heard in the lungs, but there are no abnormal inflammatory lesions on chest X-ray or lung CT. Most often, bacterial infections are combined and antibiotic treatment is recommended. Lung infections also present with fever, cough, sputum, and sometimes chest pain and dyspnea. It is recommended to do a chest X-ray or lung CT examination to see the inflammatory lesions in the lungs. Laboratory tests for routine blood tests, mycoplasma antibodies, sputum culture, and tuberculosis antibodies are needed to differentiate it from tuberculosis. Pneumonia is considered to be a bacterial infection and can be treated with antibiotics.