Bronchospasm - Temporary narrowing of the bronchi (airways into the lungs) due to contraction of the muscles in the walls of the bronchi, by inflammation of the lining of the bronchi, or by a combination of both.
Contraction may be triggered by the release of substances during an allergic reaction (see allergy). When the airways are narrowed, the air is reduced, causing wheezing or coughing.
Asthma is the most common cause of bronchospasm. Other causes include respiratory infection, chronic obstructive pulmonary disease (see pulmonary disease, chronic obstructive), anaphylactic shock, or allergic reaction to chemicals.
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