Breathing sound that is high-pitched and tight A purring or whistling sound You can hear it best when your child is breathing out Use this guide only if your child has not been diagnosed with asthma ...

A narrowing of the smallest airways in the lung (bronchioles) causes wheezing. This narrowing results from swelling caused by a virus. The respiratory syncytial virus (RSV) causes most bronchiolitis.

BACKGROUND Salbutamol is frequently used as a bronchodilator for infants who wheeze. Many single dose studies have questioned its effectiveness. AIMS To investigate the response of wheezy infants to ...