Pulmonary distension belongs to the diagnosis of Chinese medicine, similar to Western medicine such as slow branch, emphysema and pulmonary heart disease. Chinese medicine believes that the lung does not hurt without coughing, the spleen does not hurt without coughing, and the kidney does not hurt without coughing without wheezing. Lung distension refers to the deficiency of the lungs, spleen and kidneys caused by various lung diseases that persist and are not treated, with the main pathological changes being unfavorable trachea, congestion of lung gas and chest distension. Its clinical manifestations are repeated coughing, coughing sputum, wheezing, shortness of breath, chest fullness, and even cyanosis of lips and nails, wheezing, swelling of limbs, and in severe cases, coma and wheezing.