Quick answer. Pulmonary fibrosis is scarring of the lung tissue that makes the lungs stiff and gradually causes breathlessness and a dry cough. While the scarring cannot be reversed, treatments such as antifibrotic medicines and oxygen can slow progression and ease symptoms, so early specialist assessment matters.
Pulmonary fibrosis is a condition in which the delicate tissue of the lungs becomes scarred and thickened. This scarring makes the lungs stiff and less able to transfer oxygen into the blood, leading to progressive breathlessness and a persistent dry cough. It tends to develop gradually and worsen over time, though the speed varies a great deal from person to person.
In Singapore, pulmonary fibrosis is managed by respiratory physicians, who work to identify the cause where possible and slow the disease. Some cases have no identifiable cause (idiopathic), while others are linked to occupational dust exposure, certain medicines, or autoimmune conditions. Although the existing scarring cannot be undone, newer antifibrotic medicines can slow its progression, and oxygen and rehabilitation can improve quality of life. Early diagnosis gives the best chance to act.
At a glance
| Aspect | Detail | What it means for you |
|---|---|---|
| Idiopathic | No identifiable cause found | Antifibrotic medicines may slow progression |
| Occupational / environmental | Dust, asbestos or mould exposure | Avoid further exposure; assess and monitor |
| Autoimmune-related | Linked to conditions like rheumatoid arthritis | Treat the underlying condition alongside lung care |
| Drug-induced | Certain medicines or radiotherapy | Review and adjust the responsible treatment |
| Advanced disease | Severe breathlessness, low oxygen | Oxygen therapy; transplant considered in selected cases |
What is pulmonary fibrosis?
Pulmonary fibrosis means scarring (fibrosis) of the lung tissue. Healthy lungs have soft, elastic walls in their tiny air sacs that allow oxygen to pass easily into the bloodstream. In pulmonary fibrosis these walls become thickened, stiff and scarred, so the lungs cannot expand and transfer oxygen as well as they should. The result is breathlessness that worsens over time.
It is more common in older adults and develops gradually. The term covers a group of conditions: when no cause can be found it is called idiopathic pulmonary fibrosis, while in other cases it is linked to a known trigger such as dust exposure, certain drugs or an autoimmune disease. In Singapore, respiratory physicians assess the pattern of scarring and search for an underlying cause, because this shapes both treatment and outlook.
Symptoms & signs
Symptoms usually come on slowly and worsen over months to years. The main features are:
- Breathlessness, at first only on exertion and later with milder activity
- A persistent dry cough
- Tiredness and a general lack of energy
- Unintended weight loss in some people
- Aching muscles and joints
- Clubbing – a rounding and widening of the fingertips and nails in some cases
Because breathlessness creeps up gradually, people sometimes put it down to ageing or being unfit. A cough or breathlessness that is steadily getting worse over months should always be checked rather than dismissed.
Causes & risk factors
Pulmonary fibrosis can have several causes, and sometimes none can be identified. Recognised contributors and risks include:
- Idiopathic – no cause found, the most common single category
- Occupational and environmental exposure – long-term inhalation of dusts such as asbestos, silica, certain metals, or mould
- Autoimmune conditions – such as rheumatoid arthritis and scleroderma, which can scar the lungs
- Certain medicines and radiotherapy – some drugs and chest radiation can damage lung tissue
- Age and smoking – it is more common in older adults, and smoking is a risk factor
- Family history – a minority of cases run in families
Identifying a cause matters because removing an ongoing trigger, such as a dust exposure or a responsible medicine, can help slow further damage.
How it's diagnosed
A respiratory physician diagnoses pulmonary fibrosis by combining your history with tests, including:
- High-resolution CT scan of the chest – the key imaging test, which shows the pattern and extent of scarring
- Lung function tests – to measure how stiff the lungs are and how well oxygen transfers
- Blood tests – to look for autoimmune conditions and other causes
- Oxygen level checks – at rest and sometimes during exercise
- Lung biopsy – occasionally needed if the diagnosis remains unclear
Specialists often discuss complex cases together to agree on the diagnosis and the most suitable treatment, as the cause and pattern of fibrosis guide the plan.
Treatment options
The scarring of pulmonary fibrosis cannot be reversed, but treatment aims to slow its progression, ease symptoms and maintain quality of life:
- Antifibrotic medicines – drugs that can slow the rate of scarring in certain types of pulmonary fibrosis, particularly idiopathic disease
- Treating an underlying cause – for example managing an autoimmune condition or stopping a responsible medicine or exposure
- Oxygen therapy – to relieve breathlessness and support activity when oxygen levels are low
- Pulmonary rehabilitation – a structured exercise and education programme that improves stamina and confidence
- Vaccinations and infection prevention – to protect vulnerable lungs
- Lung transplant – considered for selected people with advanced disease
Care is individualised, and supportive measures matter as much as medication. This guide does not quote prices, as treatment varies considerably between people.
When to see a doctor & which specialist
See a doctor if you have breathlessness that is gradually worsening, a dry cough lasting more than a few weeks, or unexplained tiredness or weight loss. Pulmonary fibrosis is easier to manage when picked up earlier, and prompt referral allows the right tests and treatment to begin.
Seek urgent care – call 995 or go to A&E – if you become suddenly much more breathless, your breathing is severely laboured, your lips or fingertips turn blue, or you have chest pain or collapse. A sudden worsening of breathlessness can signal a chest infection, a flare of the fibrosis, or another serious problem that needs immediate assessment.
The specialist who diagnoses and manages pulmonary fibrosis is a respiratory physician (lung specialist). You can find one through our directory of respiratory physicians in Singapore. If an autoimmune condition is involved, care may be shared with other specialists.
Related guides
- Best Respiratory & Lung Clinics in Singapore — our editorial shortlist
- Keratoconus
- Ptosis (droopy eyelid)
- Mitral valve prolapse
- Sarcoidosis
- Essential tremor
Sources
- NHS – Idiopathic pulmonary fibrosis
- Mayo Clinic – Pulmonary fibrosis
- SingHealth – Conditions and treatments
- HealthHub Singapore – Lung health
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