Wheezes are usually high pitched, consist of single or multiple notes, occur during inspiration or expiration (more commonly expiration), and originate from airways of any size, from the large extrathoracic upper airway to the intrathoracic small airways.

Is wheezing upper or lower airway?

Wheezing stems from the child's lungs (the lower airway). "To tell if the sound you're hearing is a wheeze or not, you have to listen to the lungs," Walsh says.

Where do you hear wheezing?

Wheeze-like sound heard when a person breathes. Usually it is due to a blockage of airflow in the windpipe (trachea) or in the back of the throat. Wheezing.