Patients with chronic bronchitis are mainly characterized by repeated episodes of coughing and sputum, while those with acute exacerbation are often combined with wheezing symptoms. 1. Cough: patients mostly develop in winter and spring, mainly in the morning cough, less cough during the day, cough in summer and fall days to reduce or disappear. Severe patients may cough in all seasons and cough day and night. 2. Coughing sputum: generally white mucous sputum, occasionally with blood in the sputum, most of the patients in the early morning after waking up or after a change in body position more sputum. Most patients discharge more sputum after waking up in the early morning or after a change in body position. The amount of sputum increases when the patient is infected, or the sputum is yellow and purulent. 3. Wheezing: mostly occurs in the acute exacerbation of chronic bronchitis, if the wheezing symptoms are obvious, be alert to whether the combination of asthma, combined with emphysema patients may be manifested as shortness of breath after activity. Warm tips: patients with chronic bronchitis should pay attention to quit smoking, enhance physical fitness, prevent colds. In the acute exacerbation of the disease should consult a doctor in time, under the guidance of the doctor for anti-infection, cough expectorant and asthma treatment.