Both theoretically and practically, auscultation can hear asthma for the following reasons: asthma is a chronic inflammatory disease of the airway, there is a hyperresponsiveness of the airway, and an acute attack occurs under the action of various stimuli, which manifests itself as sudden wheezing, chest tightness, shortness of breath and other symptoms. Therefore, in the clinical symptoms, the patient can be seen to have obvious shortness of breath, which is manifested in the sitting position, and from the physical signs, we can see that the amplitude of the patient’s chest rise and fall increases, deepens, and some of them can be manifested as obvious abdominal respiration, and at this time, when the lungs are auscultated, we can smell obvious rales in the lungs, which are mostly manifested as catarrhal or whistling sounds. Therefore, in combination with the relevant medical history, the detection of typical rales in the lungs can be recognized as asthma. However, although lung auscultation can detect asthma, it cannot confirm the diagnosis of asthma, because lung rales can also be seen in other respiratory diseases, such as chronic obstructive pulmonary disease, wheezing bronchitis, and so on.