bronchitis

Bronchitis is a chronic, non-specific inflammation of the trachea, bronchial mucosa, and surrounding tissues. Clinically, it is characterized by long-term cough, sputum or accompanied by wheezing and recurrence. Chronic cough, sputum, or wheezing, which lasts for 3 months each year, for 2 consecutive years or more, and can be repeated for other heart and lung diseases. Some patients can develop obstructive emphysema, chronic lung Primary heart disease.