Cough is always due to a Respiratory Tract condition, somewhere between the nose & depths of the lung.
We divide it into “Upper” and “Lower” Respiratory Tracts:
• Upper Tract: nose, sinuses, throat, & trachea (windpipe)
• Lower Tract: lungs
• See Diagrams — Upper and Lower Respiratory Systems
For the clinician’s approach to diagnosing “Cough,” select either:
Acute Cough (lasting 2-3 weeks or less)
Chronic Cough (going on 4 weeks or more)