Asthma and COPD: what is the difference?

Asthma commonly involves variable airway narrowing and inflammation, with symptoms that may come and go. COPD involves persistent airflow limitation, often alongside long-term exposure to tobacco smoke, fumes or dust. A person can have features of both.

Neither cough nor wheeze identifies the diagnosis on its own. The clinician looks at when symptoms began, whether they vary by time or trigger, smoking and workplace exposure, allergy history, previous flare-ups and the effect of treatment.

Breathing tests can show the pattern of airflow before and after an airway-opening medicine. Results are interpreted with the history and examination because a single test may be affected by effort, current symptoms or treatment already in use.

Use inhalers according to the condition-specific plan and have technique checked with the actual device. Avoid tobacco smoke and inhaled irritants, stay physically active within a safe level, and keep recommended vaccinations and reviews up to date.

Do not swap, stop or borrow inhalers based on symptoms alone. Asthma treatment needs adequate anti-inflammatory protection, while COPD care may combine airway-opening medicines with other measures according to symptoms and flare history. Mixed features require an individual plan.

Seek a timely review for increasing breathlessness, a new limitation in walking or daily tasks, more frequent nighttime symptoms, changed sputum, fever, or repeated need for rescue treatment. These changes can reflect a flare, infection or another heart or lung problem.

Call emergency services if breathing becomes severe at rest, speech is broken by breathlessness, lips turn blue or grey, chest pain is intense, confusion or marked drowsiness develops, or the prescribed rescue steps are not helping.

Ask which findings support asthma, COPD or features of both; whether breathing tests should be repeated; what each inhaler is intended to do; which exposures matter; and how to recognise and respond to a flare.