What should you know about wheezing when breathing out?

Airway tightening or swelling can make exhalation whistle. This is seen with asthma and COPD, and it may occur while the airways are irritated by acute bronchitis. Bronchiolitis can cause wheezing in babies and young children. Allergies and inhaled irritants such as smoke can provoke symptoms. A clinician may hear a wheeze more clearly when you breathe out forcefully, but do not force deep breaths if you are struggling.

Consider whether the noise follows activity, a cold, dust, pets, smoke, or a known allergy. Record cough, chest tightness, fever, night waking, and any change in your ability to walk or speak comfortably.

Stop exertion, sit upright, and avoid the suspected irritant. Use your own prescribed reliever medicine according to your written instructions, and check technique with a clinician if it is not helping as expected. Arrange a review for a first or recurrent wheeze, especially when it limits activity or disturbs sleep. A healthcare professional can decide whether an inhaler, tests, or nebuliser treatment is suitable.

Get emergency help if breathing becomes severe or rapidly worse, you cannot speak in usual phrases, your lips turn blue or grey, you become faint or confused, or you develop chest pain with breathlessness. Wheeze with facial, tongue, or throat swelling may be anaphylaxis. Seek urgent assessment for a young child who is tiring, pulling in at the ribs, or unable to feed.

Ask whether the sound fits lower-airway narrowing, how to recognise an asthma flare, whether you need a breathing test, and exactly when to use urgent services.