Bronchial asthma, referred to as asthma, is a heterogeneous disease characterized by chronic airway inflammation and airway hyperresponsiveness. Its main characteristics include chronic airway inflammation, airway hyperresponsiveness to various stimuli, variable reversible airflow restriction, and a series of changes in airway structure caused by the prolongation of the course of disease. The clinical manifestations of asthma are recurrent wheezing, shortness of breath, chest tightness or cough, which often occur or worsen at night and in the early morning. Most patients can relieve themselves or relieve after treatment. Although asthma cannot be eradicated at present, long-term standardized treatment can make most patients achieve good or complete clinical control.
