What should you know about cough variant asthma?

The cough may be dry and troublesome at night, after exercise, in cold air, or around irritants. Some people also develop chest tightness or wheezing, while others notice only the cough. A cough has many possible causes, so this pattern cannot be confirmed from symptoms alone.

A clinician may ask about triggers, timing, family history, allergies, and response to treatment. Breathing tests can help show variable narrowing of the airways. [Allergic Rhinitis](/conditions/allergic-rhinitis/) and [House Dust Mite Allergy](/conditions/house-dust-mite-allergy/) may coexist, and [Chronic Cough](/conditions/chronic-cough/) describes duration rather than one specific cause.

Keep a brief record of when the cough appears, what triggers it, sleep disruption, exercise effects, and any inhalers used. Avoid smoke and known irritants, and follow the inhaler plan prescribed for you. Do not stop a preventer medicine because the cough improves without discussing the change. A [Nebuliser Treatment](/treatments/acute-and-urgent-care/nebuliser-treatment/) may be used in selected situations, but it is not a substitute for a personalised asthma plan.

Seek emergency help for severe breathing difficulty, blue or grey lips, confusion, collapse, or inability to speak normally. Seek prompt care if symptoms are escalating, reliever medicine is not helping as directed, or chest tightness is new and severe. A recurrent cough that interrupts sleep or activity deserves assessment even without wheezing.

Ask which tests could distinguish cough variant asthma from reflux, infection, allergy, or another cause; whether you need a preventer; how to use your inhaler; and what symptoms should trigger urgent help.