Chronic bronchitis may cause obstructive emphysema, chronic obstructive pulmonary disease, pulmonary heart disease, etc. The main cause of chronic bronchitis is chronic non-specific inflammation of the airways caused by smoking, environmental pollution, infections, allergies, etc. In fact, the main cause is smoking. The symptoms are mainly coughing, coughing phlegm, some patients also have wheezing symptoms, at the very beginning may be coughing white phlegm in the morning, after exposure to cold air or smoking coughing symptoms may be aggravated, some patients have wheezing symptoms. In the case of acute exacerbation, the coughing symptoms are more pronounced recently with yellow sputum, and the main treatment for acute exacerbation is infection control, cough suppression and expectoration. If the cough is in clinical remission, which is a long period of time without coughing, it is better to increase physical fitness, increase the body’s resistance, increase nutrition, exercise and prevent recurrence.