Wheezing is simply a whistling sound made when breathing.

It is commonly heard in the lungs of patients with

Asthma

Croup

Pneumonia

Bronchitis

RSV(children)

Other respiratory illnesses

Wheezing is usually a sign that there is a problem with the lungs. If you notice wheezing and have never talked to your doctor about it, you should contact him as soon as possible.