Symptoms caused by bronchiectasis are usually persistent or recurrent. Bronchiectasis is a chronic respiratory disease characterized by abnormal and persistent dilatation of the bronchial tubes, caused by the destruction of the structure of the bronchial walls for various reasons. For patients with bronchiectasis, the typical symptoms caused by the disease are persistent or recurrent coughing, coughing up sputum or purulent sputum, with or without hemoptysis. Patients with bronchiectasis experience recurrent infections, which may be exacerbated by bronchial infections alone, or may result from pneumonitis due to involvement of the surrounding lung parenchyma by the lesion. This may be characterized by fever, worsening cough, and increased sputum production. Therefore, the symptoms caused by bronchiectasis are characterized by persistence or recurrence, and the amount of sputum is related to the severity of the disease. Patients with bronchiectasis should pay attention to keep warm on weekdays, and smokers should quit smoking. If there is a fever or a sudden worsening of cough or sputum symptoms, consult a doctor for standardized treatment under the guidance of the doctor.