The difference between bronchitis and pharyngitis includes the site of onset, causes, symptoms and treatment. 1. The site of disease: bronchitis is inflammation of the mucous membrane of the trachea and bronchial tubes and the surrounding tissues. Laryngitis is an inflammatory lesion of the throat. 2. Etiology: the cause of bronchitis is not clear, the main risk factors are infectious factors, other respiratory diseases, allergies, environmental factors and immune factors. The common causes of laryngitis are bacterial or viral infections, and laryngitis can also be triggered by excessive voice use and physical and chemical factors. 3. Symptoms: For most patients with bronchitis, common symptoms of the disease include coughing, coughing up sputum, and occasionally blood in the sputum. Common symptoms of laryngitis include sore throat, hoarseness, coughing up phlegm and coughing. 4. Treatment: bronchitis in acute attacks need to control the infection, but also need to use expectorant drugs to improve the symptoms, if necessary, the appropriate use of hormones. The main treatment of laryngitis is local treatment, and should be based on different pathogens to choose the appropriate anti-infective drug treatment. Although bronchitis and laryngitis are both respiratory diseases, but there are significant differences between the two diseases, once you suspect that you are sick, you should consult a doctor in a timely manner, not to judge the treatment.