17809 Interstitial Lung Disease

Overview

Interstitial lung disease (ILD) is a broad group of conditions that cause scarring and stiffening of the lungs. The word 'interstitial' refers to the tissue that supports the tiny air sacs where oxygen enters your blood. When this tissue becomes inflamed or scarred, it makes it harder for your lungs to expand and to pass oxygen into your bloodstream.

ILD is considered uncommon, but it is not extremely rare. It is diagnosed in about 50 people per 100,000 each year around the world.

It most often affects adults over the age of 50, though it can occur at any age. Men are slightly more likely to develop it, and it is more common in people who have smoked, worked in dusty jobs, or have certain autoimmune conditions.

Symptoms

Common symptoms

• Dry, persistent cough that does not go away
• Shortness of breath, especially during activity
• Feeling tired or weak
• Discomfort or tightness in the chest
• Unexplained weight loss
• Fingertips that become rounded or widened (called 'clubbing')

Symptoms in children

• In children, ILD is very rare. When it happens, symptoms are similar to adults: coughing, fast breathing, tiring easily during play, and poor weight gain or slow growth.

Symptoms in older adults

• In older adults, symptoms may be mistaken for normal aging or other lung problems. If you or a loved one has a cough or breathlessness that is getting worse, it's important to have it checked.

Causes

Main causes

• The body's immune system attacking lung tissue (autoimmune diseases like rheumatoid arthritis or scleroderma)
• Long-term exposure to certain dusts, chemicals, or fibers, such as asbestos, coal dust, silica, or metal dust
• Some medicines, including certain chemotherapy drugs or anti-inflammatory medicines
• Radiation therapy to the chest for cancer treatment
• In many cases, the cause is unknown — this is called 'idiopathic' pulmonary fibrosis or ILD

Risk factors

• Age over 50
• Smoking or exposure to second-hand smoke
• Having a family member with ILD or pulmonary fibrosis
• Working in mining, farming, construction, woodworking, or other occupations with dust exposure
• Having an autoimmune disease
• Having certain viral infections, such as HIV, in some cases

When to see a doctor

See a doctor urgently if:

• If you have any of the emergency or urgent symptoms above, seek medical help right away
• If your usual breathing suddenly becomes much worse, call your doctor or your local emergency number

Book a routine appointment if:

• If you have a persistent dry cough that lasts more than three weeks
• If you feel short of breath doing activities you could easily do before
• If you feel unusually tired or lose your appetite without a clear reason

Diagnosis

Your doctor will listen to your breathing, ask about your symptoms, medical history, and any exposures to dust or chemicals. They may check your oxygen levels and then refer you to a lung specialist (a pulmonologist) for more tests.

Tests that may be done

• Chest X-ray to look for scarring or other changes
• High-resolution CT scan — a detailed scan of your lungs
• Spirometry (lung function test) to measure how well you breathe in and out
• Blood tests to look for autoimmune conditions or signs of inflammation
• In some cases, a lung biopsy — taking a tiny sample of lung tissue for analysis

What to expect at your appointment

Getting a clear diagnosis can take a few weeks because ILD is not always easy to tell apart from other lung conditions. You may need to see a specialist several times and repeat some tests. Be patient with the process — it ensures you get the right care.

Treatment

There is currently no cure for most types of ILD, but there is a lot that can be done. Treatment focuses on slowing the progression of the disease, reducing symptoms, improving breathing, and supporting your overall well-being.

Self-care at home

• If you smoke, get help to stop — this is one of the most important steps
• Avoid breathing in dust, fumes, second-hand smoke, or other lung irritants
• Stay active within your limits and rest when needed
• Ask your doctor about pulmonary rehabilitation — a supervised program that helps you exercise more easily and manage breathlessness
• Keep up with vaccinations (like flu and pneumonia vaccines) to lower your risk of lung infections

Medical treatments

Specialists may prescribe medicines that reduce inflammation or slow the scarring process, such as immune-modulating treatments or specific antifibrotic medicines. Oxygen therapy may be used if your blood oxygen levels drop. Your treatment plan will be personalised to your type of ILD, your age, and your overall health. Always discuss any questions or concerns with your healthcare team.

When is surgery considered?

In very advanced, quickly progressing ILD, a lung transplant may be considered for some people. This is a major operation and not suitable for everyone. Your specialist team will talk through the risks, benefits, and what it would mean for you.

Living with this condition

Living with ILD often means learning to pace yourself. Plan your day around your energy levels, break tasks into smaller steps, and use breathing techniques to help you control breathlessness. Many people use a small hand-held fan or learn positions that make breathing easier.

Lifestyle tips

• Avoid smoking and smoky environments
• Wear a protective mask if you are in dusty environments
• Use supplemental oxygen exactly as your doctor prescribes, if you have oxygen therapy
• Join a support group — talking with others who understand can make a big difference
• Keep a diary of your symptoms to share with your care team

Diet and exercise

Eating a balanced diet keeps your strength up. If you lose weight easily, try small, frequent meals with nourishing foods. Gentle exercise — such as walking, stationary cycling, or water-based activities — can strengthen the muscles that help you breathe. Always check with your doctor before starting a new exercise routine.

Mental health and emotional wellbeing

Coping with a long-term lung condition can bring anxiety, sadness, frustration, and fear. These feelings are completely normal. Talk to your doctor or nurse if you're struggling — talking therapies, mindfulness, and sometimes medication can help you feel more in control.

Prevention

You cannot always prevent ILD, especially when the cause is unknown or linked to an autoimmune disease. But you can lower your risk by not smoking, protecting yourself from dust and chemicals at work, and getting timely treatment for any existing lung condition.

Vaccines

Vaccines are especially important if you have ILD because infections can make your breathing worse. Make sure you receive the seasonal flu vaccine and recommend the pneumonia vaccine as part of your yearly health plan. Ask your doctor or pharmacist about which vaccines are right for you.

Screening programmes

There is no routine screening test for ILD. However, if you have symptoms or a high risk from occupation or family history, your doctor may suggest a lung function test or a CT scan to look for early changes.

Complications

If left untreated

• Without proper care, ILD can slowly worsen, making breathing more difficult over time
• Low oxygen levels in the blood can develop, leading to fatigue and damage to other organs
• Increased pressure in the arteries of the lungs (pulmonary hypertension), which strains the heart
• Higher risk of lung infections like pneumonia
• In severe cases, respiratory failure can occur

Long-term outlook

The outlook for ILD depends on the specific type and how fast it progresses. Some people remain stable for many years, while others have a quicker course. Wherever you are on that journey, a diagnosis of ILD is not the end — treatments are advancing all the time, and specialised care, rehabilitation, and strong support networks can help you live as fully and comfortably as possible.

Find support

External links open third-party websites. Ruqelo Health is not responsible for external content. Listing an organisation does not imply endorsement.