Asthma, short for bronchial asthma, is a chronic inflammatory disease of the airways characterized by reversible airflow limitation. Asthma is recognized as one of the four chronic diseases by the world medical community, and is listed as the top ten causes of death. Epidemiological data show that there are approximately 160 million asthmatics worldwide. In my country, the prevalence of asthma is 1% to 4%. Children and the elderly are the high-risk groups, and there is no significant gender difference. About 40% of patients have family history. The etiology of asthma is still not very clear, and it is considered to be related to polygenic inheritance and environmental factors such as inhalation, infection, food, medicine and climate change. Asthma seriously endangers people’s physical and mental health, weakens the ability to work, reduces the quality of life, and is difficult to be cured, and is prone to repeated attacks. If the treatment is not timely and standardized, asthma can be fatal. And standardized treatment can make close to 80% of asthma patients get very good control, work and life are hardly affected by the disease. The prognosis for asthma varies from person to person. Patients with mild symptoms and children have a good prognosis; adult asthma can be controlled for a long time after regular treatment; patients with severe symptoms, combined with chronic obstructive emphysema and heart disease have a poor prognosis.