Idiopathic pulmonary fibrosis (IPF) explained

NHS inform explains that in IPF the tiny air sacs in the lungs (alveoli) become damaged and increasingly scarred. That makes the lungs stiff and makes it difficult for oxygen to get into the blood.

Asthma + Lung UK places IPF within a larger family called interstitial lung diseases and describes it as a progressive type of pulmonary fibrosis. Scarring that is already present cannot be reversed. The aim of treatment is to slow it down and keep the condition as stable as possible.

The word idiopathic is the key. When doctors find an identifiable cause for lung scarring, such as dust exposure, a drug, or an autoimmune condition, the diagnosis is a different type of fibrotic lung disease and the outlook and treatment can differ.

The NHS lists shortness of breath, a dry cough that does not go away, feeling tired, and fingernails curving over rounded fingertips (clubbing). Symptoms usually start slowly but continue to get worse.

NHS inform adds loss of appetite and weight loss. It notes that many people ignore early breathlessness and blame age or being out of shape. Eventually even light activity such as getting dressed can cause breathlessness.

Asthma + Lung UK says the GP may also hear crackling sounds in the chest through a stethoscope or notice blue or grey lips from low blood oxygen. It adds that breathlessness has many other causes, including COPD, heart disease and being less fit, which is why it needs assessing.

The NHS says the cause is not known, though in some cases it has been linked to long-term exposure to dusts such as metal, wood or asbestos. Having a close family member with IPF may raise risk.

NHS inform lists links with metal or wood dust, viral infections, family history, gastro-oesophageal reflux disease and smoking, while stressing it is not known whether some of these directly cause IPF. Asthma + Lung UK says IPF mainly affects people over 50 and that smoking and a family history of interstitial lung disease raise risk.

A GP will ask about smoking, work exposures and other conditions, listen to the chest, look at the fingertips and may arrange a chest X-ray. NHS inform says the GP may ask you to walk around for a few minutes to see whether you become breathless.

If IPF is suspected, referral to a hospital specialist follows. The NHS lists spirometry, a breathing test, and a chest X-ray followed by a chest CT scan to look for scarring. NHS inform adds blood tests and says usually IPF is diagnosed without further tests.

NHS inform says antifibrotic treatment can help slow IPF but nothing currently stops or reverses the scarring. The two medicines named by the NHS are pirfenidone (Esbriet) and nintedanib (Ofev). You take them as tablets or capsules several times a day, with regular blood tests.

NHS inform adds that specialist teams often monitor breathing tests and scans over time before starting treatment. Whether a medicine is suitable is a specialist decision.

Support for symptoms is just as important. The NHS lists oxygen therapy, either at home, portable, or both, to ease breathlessness and help activity, and local pulmonary rehabilitation courses with education and exercises.

NHS inform says oxygen may be advised all the time if levels are low at rest, or only when moving about if levels drop only then.

The NHS advises stopping smoking, exercising regularly, eating a balanced diet and having the annual flu, pneumococcal and RSV vaccines if eligible, because infections can be more serious with a lung condition.

In rare cases, a specialist may recommend a lung transplant. NHS inform notes donor lungs are scarce and people have to be otherwise very fit to benefit.

The NHS says IPF gets worse over time, but how quickly varies from person to person. If treatment works well, you may not have many symptoms for years. Over time it can lead to chest infections, pulmonary hypertension and heart failure, which can reduce quality of life and life expectancy.

Asthma + Lung UK addresses life expectancy directly. It says the often-quoted figure of 3 to 5 years comes from older research, and that newer treatments are improving outcomes for many people. It explains that outcome depends on age, general health, lung function results, treatment response and smoking, and that people can choose how much they wish to know.

It also says that stable periods can be interrupted by a sudden worsening, called an exacerbation or flare-up. Regular reviews help the team track change.

If doctors think nothing more can slow progression, the NHS says supportive treatment known as end of life care is provided, and NHS inform calls this palliative care. Charities including Action for Pulmonary Fibrosis and the Pulmonary Fibrosis Trust offer information and peer support.

Asthma + Lung UK advises seeking urgent advice from your GP or NHS 111 if you feel more breathless than usual, are coughing more or your cough changes, find usual activities harder, are more tired than normal, or have blue or grey lips that are not usual for you.

Call 999 for severe difficulty breathing, such as not being able to get words out, or for sudden breathlessness with chest pain or a tight chest. The NHS says infections can be more serious if you have a lung condition.

On the NHS, a GP refers you to a respiratory or interstitial lung disease team, which arranges scans, breathing tests and, where suitable, antifibrotic prescribing. NICE has a clinical guideline on diagnosing and managing IPF in adults.

A private respiratory consultant can offer faster initial scans and breathing tests. If antifibrotics are recommended, ask how they would be supplied and monitored, and whether care would continue alongside an NHS specialist team. Do not stop or change prescribed medicines without medical advice.