Health condition
Post-viral cough
A dry, tickly cough that lingers for weeks after a cold or flu is common and self-limiting - the airway's cough reflex stays sensitised after the infection clears - but a cough still going at eight weeks moves out of this category and needs assessment.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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The pattern: an infection settles but the cough continues - dry, tickly, triggered by talking, laughing, cold air or lying down - typically fading over 3-8 weeks
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The mechanism is a temporarily hypersensitive cough reflex plus lingering airway inflammation, not ongoing infection - antibiotics do not help
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Simple measures: honey, lozenges, hydration, and treating any post-nasal drip or reflux that is stoking the reflex
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Specialist review if the cough passes 8 weeks, or sooner with blood, breathlessness, wheeze, fever or weight loss
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
Respiratory viruses inflame the airway lining and reset the cough reflex to a hair trigger, and both take time to normalise after the virus itself has gone - which is why the cough is so often the last symptom standing, sometimes weeks after everyone stopped being sympathetic. The character is distinctive: dry and tickly, set off by a change in air temperature, a long sentence, a laugh, or lying down at night, in someone who otherwise feels recovered. It is a nuisance with a good prognosis, and reassurance plus time genuinely is the evidence-based treatment.
Diagnosis and treatment routes
Sensible supportive care - honey (well-evidenced for cough), fluids, lozenges to soothe the tickle, and a nasal spray if post-nasal drip is contributing - eases the weeks of waiting, while antibiotics have no role in what is now an empty, inflamed airway rather than an infected one. The boundaries matter, though: coughing blood, breathlessness, wheeze, fevers returning, weight loss or simply passing the eight-week mark are the signals to step off the reassurance pathway and investigate properly, starting with a chest X-ray and an assessment for asthma, reflux and upper airway causes. In many parts of the UK, routine NHS referrals for this kind of problem currently take 20-45+ weeks, whereas an initial appointment with a private consultant is typically available within around two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant respiratory physician. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Post-viral cough.
Quick, plain-English answers to what people ask us most.
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What is a post-viral cough?
A post-viral cough is a persistent cough that continues for weeks after a respiratory viral infection has otherwise resolved, caused by ongoing irritation and sensitivity of the airways following the infection.
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What causes a post-viral cough?
Viral infections can cause temporary inflammation and increased sensitivity of the airway lining, which can persist and continue to trigger coughing even after the virus itself has cleared.
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What are the symptoms?
A dry or occasionally productive cough persisting for several weeks after a cold or other respiratory infection, sometimes triggered by cold air, talking, or exercise, without other significant ongoing symptoms of illness.
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Is a post-viral cough dangerous?
No, it's generally not dangerous and resolves on its own over time, though it can be persistent and bothersome, and prolonged coughing beyond expected timeframes should be checked to rule out other causes.
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Can a post-viral cough be treated?
Treatment is mainly supportive, as it typically resolves on its own; simple measures like staying hydrated and, if needed, short-term use of cough suppressants or inhalers can help manage symptoms while it settles.
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How long does a post-viral cough last?
It typically resolves within three to eight weeks after the original infection, though it can occasionally persist longer, particularly after certain viral infections known to cause more prolonged airway sensitivity.
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Post-viral cough vs a new chest infection — what's the difference?
A post-viral cough occurs without new fever or worsening symptoms and gradually improves over time, while a new chest infection would typically cause fresh symptoms like fever, increased mucus, or worsening breathlessness, warranting further assessment.
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Can a post-viral cough trigger or unmask asthma?
It can sometimes reveal underlying airway hyperreactivity or mild asthma that wasn't previously apparent, particularly if the cough is prolonged or associated with wheeze, which is worth discussing with a doctor if it persists.
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When is a persistent cough after a virus a concern?
If the cough is accompanied by fever, worsening breathlessness, blood in the sputum, or lasts beyond eight weeks, it should be assessed to rule out other causes such as a secondary infection or another underlying condition.
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When should I see a doctor, and how quickly can I be seen privately?
See a doctor if a cough persists beyond eight weeks or is accompanied by concerning symptoms. Private respiratory assessment is typically available within about two weeks, faster than standard NHS referral waiting times.