Bronchial asthma is a common and frequent disease of the chronic respiratory tract and a heterogeneous disease. It usually presents as a chronic inflammation of the airways, which is dominated by eosinophil infiltration. The main symptoms are episodes of wheezing, shortness of breath, shortness of breath, chest tightness, cough, dry cough, etc. Physical examination may reveal croup in both lungs. Asthma can usually be relieved by itself or with the application of asthma medication. The onset of asthma can be acute or slow, with most patients showing coughing and dyspnea, while some patients only show coughing without typical shortness of breath. The onset of asthma is more common at night or early in the morning, and it tends to worsen at this time. Sudden death can occur in severe asthma attacks. Risk factors for the development of asthma include both genetic factors and environmental factors. Most bronchial asthma is allergic asthma, which can coexist with allergic rhinitis and is associated with factors such as inhalation of allergens, drug allergies, and consumption of certain foods. There are many causes of asthma, and the pathogenesis is not yet clear. Try to avoid or reduce exposure to allergens such as pollen, dust, animal hair, etc. It is also necessary to pay attention to the diet, do not eat spicy and stimulating food, seafood, do not smoke and drink alcohol, etc.