Wheezing is a high-pitched whistling sound during breathing. It occurs when air flows through narrowed breathing tubes.
Wheezing is a sign that a person may be having breathing problems. The sound of wheezing is most obvious when breathing out (exhaling), but may be heard when taking a breath (inhaling).
Wheezing most often comes from the small breathing tubes (bronchial tubes) deep in the chest, but it may be due to a blockage in larger airways or in persons with certain vocal cord problems.
Click here to see a video about what causes wheezing.
Schatz M. Asthma in adolescents and adults. In: Bope ET, Rakel RE, Kellerman R, eds. Conn’s Current Therapy 2010. 1st ed. Philadelphia, Pa: Saunders Elsevier; 2010:section 12.
Szefler SJ. Advances in pediatric asthma in 2009: gaining control of childhood asthma. J Allergy Clin Immunol. 2010 Jan;125(1):69-78.
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