Asthma is mainly due to the stimulation of allergens, which can lead to wheezing, shortness of breath, chest tightness, and respiratory symptoms of reduced respiratory function. However, some patients with severe asthma are in serious condition, and even in mild asthma, there is a possibility of death from asthma attack caused by exposure to allergens. The bronchial dilatation airway structure has been damaged, leading to long-term infection, and especially prone to life-threatening occurrences of large hemoptysis that block the airway and cause asphyxia.