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Wheezing

The abnormal sound produced during breathing when the airways are constricted by swelling or excess phlegm. A person who wheezes when breathing should seek professional medical advice.

Whistling

A harsh, high-pitched squeaking noise produced during breathing that may be a symptom of a foreign object blocking the airways or dangerous constriction. This whistling noise may be a symptom of a life-threatening respiratory emergency and emergency services should be contacted immediately.

Whooping cough

A serious and highly infectious disease that can be life-threatening, especially in children. Symptoms include explosive fits of violent coughing followed by a sudden intake of breath that has a characteristic "whoop" sound. Also known as pertussis, whooping cough can be prevented by vaccine. Professional medical advice must be urgently sought for any person with the symptoms of whooping cough, especially unvaccinated children. See also: Pertussis

Windpipe

Another term for trachea.