The method of lung examination: the examination should be carried out in an orderly manner through vision, touch, percussion and hearing: 1, visual diagnosis. To see the appearance of the lungs, the chest is not enlarged or narrowed, for example, the chest is barrel-shaped chest, indicating that there is emphysema and other diseases. 2, palpation. Palpation is generally to understand the friction sound of the lungs, to understand whether the lungs are infected or pleurisy.3, percussion. Auscultation can be used to find out whether the lungs are clear, clear or turbid to determine whether there is inflammation or pneumothorax, etc. 4, auscultation. Auscultation is the most important, you can listen to the breath sounds are normal or abnormal, to understand whether there is wet and dry rales or rales, to understand the situation of the lungs.