The main clinical manifestations of bronchial variant asthma are cough and sputum, which may occur without the symptoms of shortness of breath. If the disease progresses further, clinical manifestations such as chest tightness, shortness of breath, shortness of breath and dyspnea may occur, and in acute attacks, extensive dry rales may be heard in both lungs due to bronchospasm. If the patient is severely ill, he or she may also develop hypoxia and symptoms of respiratory failure, such as cyanosis of the extremities. If the patient develops type II respiratory failure, carbon dioxide entering the brain can form pulmonary encephalopathy, which interferes with the brain’s energy metabolism and can lead to agitation and confusion. If the patient is combined with bacterial infection, clinical manifestations related to cough, coughing yellow sputum and fever may appear. If the above clinical manifestations occur, the possibility of bronchial asthma should be considered, and further improvement of relevant examinations is needed to clarify the diagnosis and make systematic treatment.