Asthma and coughing: what to know

The cough may occur with wheezing, chest tightness or breathlessness, but some people notice cough as their main asthma symptom. A new or changed cough still deserves assessment because infections, nasal drainage, reflux, medicines and other lung conditions can produce similar symptoms.

In asthma, the airways become inflamed and unusually sensitive. Cold air, smoke, dust, fragrances, pollen, respiratory infections or activity may prompt the airway muscles to tighten and mucus to increase. Coughing is one way the body reacts to that irritation. Patterns matter: note whether symptoms wake you, interrupt speech or activity, follow a particular exposure, or require the reliever inhaler more often than your personal plan allows.

Follow your written asthma action plan and take controller medicine exactly as prescribed, even when you feel well. Check that your inhaler technique and spacer use are correct; poor delivery can leave inflammation untreated. During a flare, use your reliever only according to the plan. Reduce exposure to known triggers without avoiding normal activity unnecessarily. Arrange a clinical review if coughing keeps returning, disturbs sleep, limits exercise or is becoming harder to control.

Seek emergency help if breathing is severely difficult, you cannot speak comfortably, your lips or face look blue or grey, you become confused or very drowsy, or the reliever medicine is not helping as your action plan says it should. Prompt medical assessment is also needed for chest pain, coughing up blood, high fever with worsening breathing, or a sudden marked change from your usual asthma pattern.

Ask whether your cough pattern fits asthma or needs testing for another cause, whether your controller treatment needs adjustment, and how to recognise your personal warning signs. Bring your inhalers and spacer so the clinician can watch your technique. A record of symptoms, triggers, night waking and reliever use can make the review more useful.