Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Wheezing

Wheezing is a whistling noise of varying pitch and loudness that occurs when the small airways of the lungs become narrower because of inflammation or a buildup of mucus and dead cells in the airway. As these small air passages become narrower, wheezing may be heard when the person breathes out. As the passages continue to narrow, wheezing may be heard when the person breathes both in and out.

When a person has severe difficulty breathing, wheezing may no longer be heard because very little air is moving through the narrowed airways.

A doctor may order a chest X-ray or breathing test (spirometry) to determine the cause of a person's wheezing. Some causes of wheezing include bronchitis, allergies, or asthma. Treatment depends on the cause of the wheezing and may include medicines, an inhaler, or a machine to help a person breathe.

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