Some patients experience chest tightness after getting bronchitis. This is because bronchitis is mainly due to decreased immunity and invasion by pathogens, such as viruses, bacteria, mycoplasma, chlamydia, rickettsiae, leptospirosis and other pathogens, which results in congestion, edema, and exudation of varying degrees of inflammatory secretion from the mucous membrane of the trachea. At this time, the airway will appear different degrees of obstruction, airflow restriction caused by ventilation and ventilation function has different degrees of decline, resulting in different degrees of hypoxia, and even accompanied by hypercapnia, so it will lead to chest tightness. In severe cases, symptoms of respiratory distress such as wheezing and shortness of breath may occur, and symptomatic treatment and anti-inflammatory etiologic treatment are the mainstays.