Pulmonary Fibrosis

Pulmonary fibrosis is scarring and thickening of the tissue deep within the lungs. The damage affects the tiny air sacs (alveoli) where oxygen passes into the bloodstream. As scarring builds up, the lungs become stiff and cannot expand as easily, so it becomes harder to breathe and to get enough oxygen.

There are several forms. When no cause can be found, it is called idiopathic pulmonary fibrosis (IPF). In other cases, fibrosis is linked to things such as long-term exposure to certain dusts, some medicines, radiotherapy, or conditions affecting the immune system. The condition usually develops gradually and tends to get worse over time, although the speed varies from person to person.

The most common symptoms are shortness of breath, which at first may only appear with activity but gradually worsens, and a persistent dry cough. Many people also feel unusually tired and may lose their appetite and some weight over time.

A less obvious sign is clubbing, where the ends of the fingers become rounder and wider. Because symptoms come on slowly, they are sometimes mistaken for ageing or being unfit, so it is worth seeing a doctor about ongoing breathlessness or a cough that does not go away.

In many cases, particularly idiopathic pulmonary fibrosis, the exact cause is not known. Researchers think a combination of factors may be involved, and links have been noted with smoking, certain viral infections, acid reflux, and a family history of the condition.

In other cases, the cause can be identified. These include long-term exposure to dusts such as wood, metal, or asbestos, exposure to mould or bird-related particles, some medicines, radiotherapy to the chest, and autoimmune conditions. Where a cause is found, avoiding further exposure is an important part of care.

Diagnosis usually combines several assessments. Breathing tests (lung function tests) measure how well your lungs are working, and blood tests can help look for underlying causes. A high-resolution CT scan of the chest provides detailed pictures of the lungs and is central to identifying fibrosis and its pattern.

In some cases, a sample of lung tissue (a biopsy) is needed to confirm the diagnosis or to tell different conditions apart. Because pulmonary fibrosis can be complex, the results are often reviewed by a team of specialists together to reach the most accurate diagnosis.

There is currently no treatment that reverses the scarring, but several approaches can slow the condition and help you stay as active and comfortable as possible. For idiopathic pulmonary fibrosis, antifibrotic medicines such as pirfenidone and nintedanib can slow how quickly the disease progresses. Where fibrosis is linked to inflammation or an immune condition, other medicines may be used.

Supportive care is also very important. This can include oxygen therapy to ease breathlessness and protect other organs, pulmonary rehabilitation (a programme of exercise and education), vaccinations to reduce chest infections, and help with managing cough and fatigue. For some people with advanced disease, a lung transplant may be considered.

Pulmonary fibrosis affects people differently. Some remain stable for a long time, while others find their symptoms progress more quickly. Although the scarring itself cannot be undone, current treatments aim to slow progression, ease symptoms, and support quality of life, and research in this area continues to develop.

Steps that can help include stopping smoking, staying up to date with recommended vaccinations, keeping as active as your breathing allows, and avoiding known triggers such as harmful dusts. Regular follow-up allows treatment to be adjusted and any complications, such as chest infections or raised pressure in the lung arteries, to be picked up and managed early.