Inflammation of the bronchial mucosa, also known as bronchiectasis, bronchitis is an acute or chronic non-specific inflammation of the bronchial mucosa and its surrounding tissues. Bronchitis is an acute or chronic nonspecific inflammation of the bronchial mucosa and its surrounding tissues caused by biotic or abiotic factors. Both biologic and abiotic factors may contribute to the development of bronchitis, with viral infections being one of the most common causes and bacterial infections in a small percentage of patients. Bronchitis is usually characterized by cough and sputum. Bronchitis is usually treated with symptomatic therapies, i.e., suppressing the cough, resolving the phlegm and calming the wheezing. Most patients with acute bronchitis do not require antimicrobials such as azithromycin unless there is a clear bacterial infection. It is recommended to go to the hospital in time if you have cough and sputum.