Health condition
Sarcoidosis lung
Sarcoidosis is an inflammatory condition forming tiny granulomas, most often in the lungs and lymph glands; many cases resolve on their own, and treatment is reserved for disease that threatens organ function - patience and monitoring are often the strategy.
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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Common presentations: enlarged chest lymph glands found on X-ray, cough and breathlessness, fatigue, or the acute triad of ankle swelling, red shin lumps and gland enlargement (which carries the best outlook)
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Many people need no treatment at all - a substantial share of pulmonary sarcoidosis remits spontaneously within two years
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Treatment (usually steroids first) is for progressive lung involvement or disease affecting the heart, eyes or nervous system
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Specialist: a consultant respiratory physician; baseline checks always include an ECG and eye review, and fatigue can outlast the inflammation itself
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
Sarcoidosis is the immune system forming organised knots of inflammatory cells - granulomas - for reasons still not fully understood, with the lungs and their lymph glands involved in the vast majority of cases; it favours younger adults, and its course spans everything from a chance X-ray finding that melts away untreated to, much less commonly, progressive scarring disease. This breadth is why the diagnosis unsettles people who research it: most of what they read describes the severe tail of a condition whose typical story is considerably gentler, particularly when it announces itself acutely with ankle arthritis and erythema nodosum.
Diagnosis and treatment routes
Establishing the diagnosis usually involves CT imaging and a biopsy of accessible tissue confirming granulomas while excluding infections and other mimics, followed by staging of what the disease actually threatens: lung function testing, an ECG (cardiac involvement is rare but important), eye screening and blood checks including calcium. Treatment decisions then follow function rather than appearance - observation for stable, symptom-light disease; corticosteroids, tapered over months, when lung function declines or vital organs are involved; and steroid-sparing agents for the minority needing long-term suppression. Monitoring continues until remission is confident, and managing the fatigue that shadows sarcoidosis often matters to patients as much as the granulomas themselves. 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 Sarcoidosis lung.
Quick, plain-English answers to what people ask us most.
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What is sarcoidosis of the lungs?
Sarcoidosis is an inflammatory condition forming tiny granulomas, most often in the lungs and lymph glands; many cases resolve on their own, and treatment is reserved for those with significant symptoms or organ involvement.
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What causes pulmonary sarcoidosis?
The exact cause isn't fully understood, but it involves an abnormal immune response forming granulomas, possibly triggered by an environmental exposure in a genetically susceptible person.
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What are the symptoms of lung sarcoidosis?
Symptoms can include persistent dry cough, breathlessness, chest discomfort and fatigue, though many people have no symptoms at all and it's found incidentally on a chest X-ray.
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Is lung sarcoidosis serious?
Many cases resolve spontaneously without treatment, but a minority progress to lung scarring (fibrosis) affecting breathing, which is why monitoring is important even in mild or asymptomatic cases.
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How is lung sarcoidosis treated?
Treatment isn't always needed, as many cases resolve on their own; when needed, corticosteroids are the mainstay, with other immunosuppressants used for more persistent or steroid-resistant disease.
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How is lung sarcoidosis diagnosed?
Diagnosis typically involves chest imaging showing characteristic patterns, blood tests, and often a biopsy (frequently via bronchoscopy) to confirm the granulomas and exclude other causes.
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Does lung sarcoidosis always need treatment?
No - many cases, especially those found incidentally with minimal symptoms, are simply monitored, as spontaneous resolution is common, particularly in earlier disease stages.
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When should I see a specialist about lung sarcoidosis?
See a doctor for persistent cough or breathlessness, or if sarcoidosis has been found on imaging. A private respiratory physician can typically be seen within about two weeks.