Interstitial lung disease is not one condition but a family of more than a hundred, all affecting the tissue between the air sacs. They look similar on a chest X-ray and feel similar to the patient, yet their treatments differ sharply — some need immunosuppression, others need antifibrotic drugs, and several need nothing more than removing an exposure. Getting the specific diagnosis right is the whole task, and interstitial lung disease treatment in Rewari at Vaayu Care is built around that.
What ILD is
Between the air sacs lies a thin scaffold of tissue — the interstitium — through which oxygen passes into the blood. In ILD this tissue becomes inflamed, thickened and eventually scarred. The lungs become stiff and small, and oxygen transfer falls. Breathlessness on exertion and a dry cough are the result.
Some ILDs are predominantly inflammatory and respond well to immunosuppression. Others are predominantly fibrotic, where scarring dominates and antifibrotic therapy is appropriate. Many sit in between and can change over time. This is why subtype matters more than the umbrella label.
Common types
- Idiopathic pulmonary fibrosis — no identifiable cause, progressive, treated with antifibrotics
- Hypersensitivity pneumonitis — an immune reaction to an inhaled antigen: birds, mould, damp hay, humidifiers. Highly relevant in India and often reversible if the exposure is found and removed
- Connective tissue disease-associated ILD — with rheumatoid arthritis, scleroderma, Sjögren's, myositis or lupus
- Sarcoidosis — inflammatory, often involving lymph nodes, frequently self-limiting but sometimes needing treatment
- Occupational lung disease — silicosis, asbestosis, coal worker's pneumoconiosis
- Drug-induced ILD — from amiodarone, methotrexate, nitrofurantoin, some chemotherapy agents
- Smoking-related ILD
- Post-infectious and post-COVID fibrotic change
Symptoms
Breathlessness on exertion, slowly progressive; a persistent dry cough; fatigue and reduced exercise tolerance; weight loss; fine crackles at the lung bases; finger clubbing in some types; and in advanced disease, low oxygen levels, particularly on walking.
Symptoms of an associated autoimmune disease — joint pain and stiffness, skin tightening, dry eyes and mouth, Raynaud's phenomenon, muscle weakness or rash — are important clues and should always be mentioned.
How ILD is diagnosed
- A detailed exposure and occupational history. This is the highest-yield part of the assessment and is frequently rushed. Birds kept at home or nearby, damp or mould, air conditioning and humidifiers, biomass smoke, stone cutting, construction, mining, sandblasting, farming and every current and past medication all matter.
- High-resolution CT (HRCT) — the central investigation, showing the pattern and distribution that point to a subtype.
- Full pulmonary function testing with DLCO, giving the baseline for monitoring.
- Six-minute walk test with oxygen saturation to detect exertional desaturation.
- Autoimmune blood panel — ANA, rheumatoid factor, anti-CCP, myositis and scleroderma panels.
- Bronchoscopy with lavage, and transbronchial biopsy in selected cases.
- Surgical lung biopsy where the diagnosis remains uncertain and would change treatment.
- Echocardiography to assess for pulmonary hypertension.
Where the picture is complex, diagnosis is best reached by discussion between chest physician, radiologist and pathologist rather than by any one test.
Treatment
Treatment follows the subtype:
- Removing the cause is definitive where one is found — rehoming birds, remediating damp, stopping an implicated drug, changing occupational exposure. In hypersensitivity pneumonitis this alone can produce substantial recovery.
- Corticosteroids and immunosuppressants — mycophenolate, azathioprine, rituximab — for inflammatory subtypes and connective tissue disease-associated ILD.
- Antifibrotic therapy for IPF and for other ILDs that have become progressively fibrotic.
- Oxygen assessment, including on exertion, with supplemental oxygen where levels fall.
- Pulmonary rehabilitation, which improves walking distance and breathlessness across almost all subtypes.
- Treating reflux, and vaccination against influenza, pneumococcus and COVID-19.
- Managing pulmonary hypertension where present.
- Transplant referral considered early in suitable younger patients with progressive disease.
- Regular monitoring of lung function every three to six months, which detects progression before symptoms change and is the main tool for judging whether treatment is working.
When to see a specialist in Rewari
Book a consultation if you have breathlessness on exertion with a dry cough lasting more than eight weeks, if a scan report mentions interstitial changes, fibrosis, ground-glass opacity or "ILD", if you have an autoimmune condition and are becoming breathless, if you keep birds or live with damp and have developed a cough, if you work with stone, sand or dust, or if you remain breathless months after COVID-19 or another severe chest infection.
Bring all previous CT films, reports and a full list of your medicines — including those stopped in the past year. Book an appointment at Vaayu Care, Rewari.
Related reading from the clinic
Frequently asked questions
Is interstitial lung disease the same as pulmonary fibrosis?
Not quite. ILD is the umbrella term for more than a hundred conditions affecting the tissue between the air sacs. Pulmonary fibrosis describes scarring, which is the end result of some but not all of them. Many ILDs are inflammatory rather than fibrotic and respond well to immunosuppression, which is why identifying the specific subtype matters so much.
Can ILD be reversed?
It depends entirely on the type. Inflammatory ILDs such as hypersensitivity pneumonitis and sarcoidosis can improve substantially, sometimes completely, particularly when a causative exposure is identified and removed. Established fibrosis cannot be reversed, but its progression can be slowed with antifibrotic therapy. This is why early, accurate diagnosis changes outcomes.
Why does my doctor keep asking about birds and damp at home?
Because hypersensitivity pneumonitis — an immune reaction to an inhaled antigen — is one of the commonest ILDs and one of the few with a genuinely reversible cause. Pigeons and other birds, mould in damp walls, contaminated humidifiers and air conditioners, and damp hay are classic triggers. Identifying and removing the exposure can produce marked improvement.
Do I need a lung biopsy?
Often not. In many patients the combination of a careful exposure history, a characteristic HRCT pattern and blood tests is enough to reach a confident diagnosis. Biopsy — bronchoscopic or surgical — is reserved for cases where the diagnosis remains genuinely uncertain and the result would change treatment.
How often will I need tests?
Lung function testing every three to six months is usual, since it detects progression before symptoms change and shows whether treatment is working. HRCT is repeated less often, generally when there is a clinical change or before a major treatment decision. Monitoring frequency is adjusted to how stable your disease is.