Chronic bronchitis is chronic inflammation of the bronchial mucosa and its surrounding tissues, fibrous changes and atrophic changes caused by a variety of reasons such as infection or non-infection. Clinical cough, sputum, wheezing as the main symptoms. Early symptoms are mild, mostly in the winter attack, late symptoms worsen, can exist for years. Disease progression can be complicated by emphysema and pulmonary heart disease. This disease is a common and frequent disease, the elderly are more common, smoking, cold areas and environmental pollution in areas with high incidence.

This disease is mainly manifested by recurrent cough, sputum or wheezing, generally coughing and sputum in the morning, white frothy mucus sputum; in acute respiratory infections, the symptoms quickly intensify, sputum volume increases, white mucous sputum or yellow pus sputum; with the recurrent episodes of the disease and progression of the disease, coughing and sputum non-stop all year round, intensified in winter and fall and wheezing; the patient has recurrent episodes of coughing, The patient has a history of recurrent cough, sputum or wheezing, except for heart and lung tumors, tuberculosis and other conditions that can lead to cough, sputum, wheezing; each time the development of at least 3 months, and continuous onset of more than 2 years; the bottom of the lungs can be heard in the dry, wet rhonchi, and wheezing can be heard in a wide range of rales.