Asthma refers to bronchial asthma, a chronic disease of the respiratory system in which patients have clinical manifestations of recurrent episodes of wheezing, dyspnea, chest tightness, or cough. Bronchial asthma has the influence of congenital factors, but most bronchial asthma is caused by acquired factors, including allergies and infections. I. Congenital factors: genetic inheritance can play an important role. Studies have shown that if both parents have bronchial asthma, the incidence of bronchial asthma in children may have to reach more than 60%. If one parent has bronchial asthma, the incidence of bronchial asthma in children may reach 20%-40%, that is, the rate of bronchial asthma patients’ relatives will be higher than that of the general population, and the closer the relatives are, the higher the rate. The more serious the patient’s condition, the higher the rate of his relatives. Second, the acquired factors: 1, allergy: in the acquired factors leading to the development of bronchial asthma, allergy is a particularly important factor leading to bronchial asthma. When allergens are present, the body’s immune system reacts to them, releasing mediators to act on target cells, and airway inflammation occurs. Such patients may have allergic reactions to pollen, willow, environmental paints, drugs, food, etc. and develop bronchial asthma; 2. Infections: infections of various causes can lead to bronchial asthma, such as viral respiratory infections, including rhinovirus, influenza virus, etc. Infection can cause airway damage, leading to abnormalities in airway regulation, causing bronchospasm and making bronchial asthma attacks. Whether it is a congenital or acquired factor, once bronchial asthma attacks, they usually recur. Patients are advised to avoid contact with allergic substances and choose anti-inflammatory drugs such as sodium cromoglycate nasal drops and nedolomide, as well as bronchodilators such as methylxanthine and salbutamol for treatment. If recurrent asthma attacks due to various allergies can be effectively prevented and serious lung dysfunction can be avoided, the survival time and quality of life of the patient will generally not be affected too much.