Health condition
Recurrent pneumonia workup
Two or more pneumonias in a few years - or one that never fully clears - always deserves explanation: the workup splits by whether infections strike the same lung zone (think local, structural) or different zones (think systemic - including antibody deficiency).
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 geographic rule: same-lobe recurrence suggests a local cause (inhaled foreign body, tumour or narrowing, localised bronchiectasis); different-lobe recurrence suggests a systemic one
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Systemic causes: antibody deficiency (CVID and friends), swallowing problems with aspiration, reflux, HIV, and cystic fibrosis or ciliary disorders presenting late
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Minimum tests: CT chest, immunoglobulins (IgG, IgA, IgM), full blood count, HIV test - with vaccine-response testing when levels are low or borderline
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Bronchoscopy inspects same-site recurrence directly; swallow assessment matters in older patients and neurological disease
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Finding antibody deficiency changes everything: immunoglobulin replacement prevents further lung destruction
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
Lungs that keep getting infected are trying to tell you where the problem is. A pneumonia that returns to the same segment points down a bronchus - to something blocking or distorting it, from an unnoticed peanut to an early tumour - while pneumonias wandering between lobes indict the defences themselves: antibodies missing, secretions misdirected by swallowing or reflux, cilia or mucus faulty. The costliest oversight is antibody deficiency, because each undiagnosed year converts infection into permanent bronchiectasis; immunoglobulin measurement is a cheap test that respiratory guidelines already recommend, yet it is missed in a large share of eventual CVID diagnoses.
Diagnosis and treatment routes
A complete assessment pairs imaging with immunology from the start: CT to map damage and localise cause, bronchoscopy for fixed-site disease, immunoglobulins and (where indicated) pneumococcal vaccine-response testing, HIV serology, and swallowing or reflux evaluation guided by the story. Each answer has a real treatment - removal or resection of local causes, replacement therapy for antibody failure, airway clearance for bronchiectasis. After a second pneumonia, ask directly whether your immunoglobulins have ever been checked; a private respiratory or immunology review is typically available within about 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 and clinical immunologist. 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 Recurrent pneumonia workup.
Quick, plain-English answers to what people ask us most.
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What counts as recurrent pneumonia needing investigation?
Two or more episodes of pneumonia within a few years, or a single pneumonia that never fully clears on imaging, always deserves explanation rather than being treated as coincidence.
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What causes recurrent pneumonia?
The workup splits by pattern: infections striking the same lung zone each time suggest a local, structural cause such as an obstructing tumour or bronchiectasis, while infections in different zones each time point towards a systemic cause, including antibody deficiency.
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How is recurrent pneumonia investigated?
Investigation typically includes chest imaging (often CT rather than just X-ray), sometimes bronchoscopy to look directly at the airways, and blood tests to check immune function, guided by whether infections recur in the same or different lung areas.
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Is recurrent pneumonia dangerous?
It can cause progressive lung damage if the underlying cause is not identified and treated, which is why a proper workup rather than repeated antibiotic courses alone is important.
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How is recurrent pneumonia treated?
Treatment depends on what the workup finds - removing or treating a structural obstruction, managing bronchiectasis with airway clearance and antibiotics, or immunoglobulin replacement for confirmed antibody deficiency.
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Recurrent pneumonia vs a slow-to-clear single infection - what's the difference?
A single pneumonia can take several weeks to fully clear on imaging even with successful treatment, whereas recurrent pneumonia means genuinely new or repeated episodes, which is the pattern that triggers deeper investigation.
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When should I see a doctor about recurrent pneumonia?
See your GP after a second pneumonia episode or if imaging never fully clears, so a respiratory physician and immunologist can investigate together. A private respiratory physician can typically be seen within about two weeks.