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Definition

Wheezing is a high-pitched whistling sound associated with labored breathing.

Description

Wheezing occurs when a child or adult tries to breathe deeply through air passages that are narrowed or filled with mucus as a result of:

• allergy
• infection
• illness
• irritation

Wheezing is most common when exhaling. It is sometimes accompanied by a mild sensation of tightness in the chest. Anxiety about not being able to breathe easily can cause muscle tension that makes matters worse.

Causes and symptoms

Wheezing is the symptom most associated with asthma. It can be caused by:

• exposure to allergens (food, pollen, and other substances, that cause a person to have an allergic reaction)
• fumes
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