Thick breath sounds are not necessarily due to inflammation, but can be seen in respiratory diseases, as well as other systemic diseases. Thickness of breath sounds is a sign heard on auscultation of the lungs, which is normally clear. The thick breath sounds may indicate the presence of inflammatory exudate, secretion blockage, airway spasm, etc.. It is common in acute infectious respiratory diseases and acute exacerbations of chronic respiratory diseases, such as acute bronchitis, pulmonary infections, and acute exacerbations of chronic obstructive pulmonary disease. It is also seen in some non-infectious (chronic) respiratory diseases and circulatory/endocrine system diseases, which may also show signs of coarse breath sounds. Examples include bronchial asthma, chronic obstructive pulmonary disease (COPD), bronchiectasis, chronic bronchitis, interstitial pneumonitis, cardiac insufficiency (less severe), and metabolic syndrome. No matter what kind of disease is causing the coarse breath sounds, it is necessary to consult the doctor in time, and carry out diagnosis and treatment under the guidance of the clinician, so as to avoid delaying the condition.