Bronchitis, or bronchial inflammation, includes the transfer of pathogens or viruses to the lower respiratory tract caused by a cold, and should be differentiated in treatment. If the patient is symptomatic of the cold itself, treat it according to the cold. If the patient is a general sore throat, fever, mild cough without sputum or chest tightness manifestation, this is an upper respiratory tract infection or cold symptom. If the patient develops a more severe cough with slightly more sputum and a certain degree of chest tightness, be alert to the presence of bronchitis and intensify anti-infective and phlegm-suppressing cough treatment, and if necessary, give certain wheezing medications. Bronchitis and colds cannot be distinguished in some cases. If bronchitis is present, chest imaging is usually not abnormal, and auscultation may be without obvious wheezing sounds. The initial determination of the presence of bronchitis is usually based on the presence or absence of chest tightness and shortness of breath. If there is it needs to be treated according to bronchitis, if it is only the symptoms of upper respiratory tract infection, it is treated according to cold.