Bronchial asthma (abbreviated as asthma) is a chronic inflammation of the airways that is mainly caused by eosinophils and mast cells. For susceptible people, this type of inflammation can cause a wide range of reversible airway obstruction symptoms of varying degrees. Clinical manifestations include repeated episodes of wheezing, dyspnea, chest tightness or coughing. It can be treated or recover on its own, and the airways are highly reactive to irritants. The above definition of asthma is based on the conclusions of recent studies on the pathophysiology of asthma in young people. As for the mechanism of asthma in the elderly, especially whether airway inflammation is the same as asthma in young people, there is still a lack of data to prove it.