Idiopathic pulmonary fibrosis

Overview

Idiopathic pulmonary fibrosis (IPF) is a lung disease where the tissue deep in your lungs becomes scarred and stiff over time. This scarring makes it hard for your lungs to take in enough oxygen, causing breathlessness and a dry cough. 'Idiopathic' means the cause is unknown.

No, IPF is a rare condition – about 3–9 people in every 100,000 are diagnosed each year.

IPF is more common in men than women and usually develops after age 50. It is sometimes linked to a family history of lung scarring, but most cases happen without a clear reason.

Symptoms

Common symptoms

• A dry, hacking cough that does not go away.
• Shortness of breath during everyday activities like walking or climbing stairs.
• Feeling tired or weak.
• Unexplained weight loss.
• Clubbing – the tips of your fingers become wider and rounder.

Symptoms in children

• IPF is extremely rare in children. When it does occur, symptoms are similar to adults, such as cough and breathing difficulty, but may also include poor growth or frequent chest infections.

Symptoms in older adults

• In older adults, breathlessness and cough are often the main symptoms, but they may be mistaken for normal aging or other conditions like heart failure. Fatigue, loss of appetite, and frailty can also be more noticeable.

Causes

Main causes

• The exact cause of IPF is unknown (idiopathic). Researchers believe it may result from an abnormal healing response after repeated tiny injuries to the lung tissue.
• Some people have a genetic predisposition that makes their lungs more prone to scarring.

Risk factors

• Smoking cigarettes or being exposed to second-hand smoke.
• Being over 50 years old.
• Being male.
• A family history of pulmonary fibrosis.
• Exposure to certain dusts at work, such as metal dust, wood dust, or silica.
• Some viral infections (though not clearly proven).

When to see a doctor

See a doctor urgently if:

• Sudden worsening of breathlessness that stops you from doing daily tasks.
• Coughing up blood or having a fever with a new cough.

Book a routine appointment if:

• If you have a dry cough that has lasted more than three weeks.
• If you find yourself getting out of breath more easily than before.
• If you have unintentional weight loss or persistent tiredness.

Diagnosis

A doctor will listen to your history and symptoms, examine you, and then arrange tests to see how your lungs are working and if there is scarring.

Tests that may be done

• Breathing tests (spirometry) – you blow into a machine to measure lung function.
• Blood tests – to rule out other causes like autoimmune diseases.
• Chest X-ray – to look for early signs of scarring.
• High-resolution CT scan – a detailed scan that shows the pattern of scarring in the lungs.
• Sometimes a lung biopsy (taking a tiny sample of lung tissue) is needed to confirm the diagnosis.

What to expect at your appointment

The diagnosis process may take several weeks. You will likely be referred to a respiratory specialist (a doctor who treats lung conditions). They will explain the results and talk with you about a treatment plan. Having a support person with you at appointments can be helpful.

Treatment

There is no cure for IPF, but treatments can help slow the disease, manage symptoms, and improve your quality of life. Treatment usually involves a team of specialists and may include medication, oxygen therapy, and pulmonary rehabilitation.

Self-care at home

• Stay as active as you can – gentle daily walks can help keep your muscles strong.
• Avoid smoking and second-hand smoke.
• Get vaccinated against flu and pneumonia (ask your doctor).
• Eat a balanced diet to keep your energy up – a dietitian can help if you are losing weight.
• Avoid lung irritants like strong fumes, dust, and air pollution.

Medical treatments

Your doctor may prescribe medications called antifibrotics that can slow the scarring process. These are taken as pills and need regular check-ups. If your blood oxygen levels are low, you may be given supplemental oxygen to use at home or when exercising. Pulmonary rehabilitation is a programme of exercise and education that helps you manage breathlessness and stay active.

When is surgery considered?

For a small number of people with severe IPF, a lung transplant may be an option. This involves replacing one or both damaged lungs with healthy lungs from a donor. It is a major operation and requires careful evaluation and lifelong medications to prevent rejection.

Living with this condition

Living with IPF means adjusting your daily routine to manage breathlessness and fatigue. Plan activities at times when you have more energy, break tasks into smaller steps, and use aids like a walking stick or a shower chair if needed. Keep your home well-ventilated and free from dust.

Lifestyle tips

• Quit smoking if you smoke – it is the most important thing you can do.
• Stay socially connected – loneliness can worsen your health.
• Practice deep breathing and relaxation techniques to help with anxiety.
• Use portable oxygen if prescribed – it can help you stay active longer.

Diet and exercise

Eat small, frequent meals that are easy to digest to avoid feeling too full, which can make breathing harder. Aim for a diet rich in fruits, vegetables, lean protein, and whole grains. Gentle exercise, such as walking or chair-based exercises, can strengthen your breathing muscles. Always talk to your healthcare team before starting a new exercise programme.

Mental health and emotional wellbeing

Living with a long-term lung condition can cause anxiety, depression, or feelings of isolation. It is normal to feel worried or sad. Talk to your healthcare team about your feelings – they can suggest counselling, support groups, or mental health services. If you are struggling with thoughts of self-harm, contact a crisis helpline or go to your local emergency department immediately.

Prevention

Because the exact cause is unknown, there is no guaranteed way to prevent IPF. However, you can reduce your risk by never smoking, avoiding exposure to lung irritants (dust, chemicals, fumes), and treating other lung conditions promptly.

Vaccines

It is especially important for people with IPF to have the annual flu vaccine and the pneumococcal vaccine to prevent serious lung infections. Ask your doctor or local pharmacy about these vaccines.

Screening programmes

Routine screening for IPF is not recommended for the general public. If you have a family history of pulmonary fibrosis, talk to your doctor about whether monitoring is appropriate for you.

Complications

If left untreated

• Worsening breathlessness leading to disability.
• Low oxygen levels in the blood (hypoxia).
• Pulmonary hypertension – high blood pressure in the arteries of the lungs.
• Respiratory failure – when the lungs cannot supply enough oxygen to the body.
• Lung cancer (slightly increased risk).

Long-term outlook

IPF is a serious condition that gets worse over time, but the rate of progression varies. With current treatments, many people live for several years after diagnosis and maintain a good quality of life. Staying active, following your treatment plan, and having strong support can make a real difference. Research is ongoing, and new therapies are being developed, so there is reason for hope.

Find support

International organisations

• Pulmonary Fibrosis Foundation
• European Pulmonary Fibrosis Federation

Local organisations

• Your local hospital respiratory department · UK
• NHS Choices – Idiopathic Pulmonary Fibrosis · UK

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