I keep wheezing: what should I know?

Wheezing is a high-pitched sound made when air moves through airways that have become tight, swollen, or partly blocked. Asthma can cause episodes after exercise, at night, or after exposure to dust, smoke, or cold air. Acute bronchitis may irritate the airways during a cough illness. Allergic rhinitis can add congestion and trigger breathing symptoms. COPD is another possible cause, particularly in people with a history of smoking or long-term irritant exposure. In young children, bronchiolitis can produce wheeze with fast or difficult breathing.

A clinician may ask when the sound began, whether it comes and goes, and whether you also have cough, chest tightness, fever, rash, or breathlessness. They may listen to your chest and check oxygen levels; further testing depends on the pattern.

Move away from smoke, strong scents, dust, or other known triggers, and sit upright while breathing. Use a prescribed reliever inhaler exactly as directed; do not borrow someone else’s inhaler or start antibiotics without advice. Keep a note of timing, triggers, nighttime symptoms, and medicines used. Arrange a GP assessment if wheezing persists, returns repeatedly, or interferes with sleep or activity. A nebuliser treatment may be considered by a clinician when inhaled medicine needs to be delivered in a different way.

Seek emergency help immediately for severe breathlessness, blue or grey lips, confusion, fainting, inability to speak in full sentences, or rapidly worsening symptoms. Wheezing with swelling of the lips, tongue, or throat, or with widespread hives after food, medicine, or an insect sting can indicate anaphylaxis and needs urgent treatment. Do not drive yourself if breathing is severely difficult.

Could my wheeze be asthma, an infection, an allergy, or another airway problem? What examination or breathing test is appropriate? Which symptoms mean I should use my prescribed medicine or seek urgent help?