Breath sounds in the lungs are obtained indirectly through the stethoscope at the time of consultation and are influenced by a variety of factors. Low breath sounds heard through the stethoscope may be due to the following conditions: i. There is some degree of bronchial occlusion or obstruction that restricts the amount of incoming and outgoing gas, thus manifesting as low breath sounds, a common cause of which is seen in pulmonary atelectasis. Second, emphysema may exist in the area, resulting in low breath sounds. Third, there may be solid changes in the lung tissue in the area of auscultation, commonly due to pneumonia. The area under auscultation may have an occupying lesion, such as a tumor. V. If the lower lung breath sounds are low, there may also be pleural effusion. Sixth, thick chest wall muscles or subcutaneous fat, that is, obese people, due to the conduction of the relationship between the auscultation of the lungs may exist in the case of low breath sounds. There are also rare cases, such as poor conduction of the stethoscope’s auscultatory components and thick auscultatory membrane, can be manifested as low breath sounds, so low breath sounds should be judged according to the specific circumstances.