What Is Interstitial Lung Disease?
Interstitial lung disease (ILD) is a group of conditions that cause inflammation or scarring inside the lungs. Over time, this damage can make the lungs stiff and make it harder for oxygen to move into the bloodstream.
Some forms of ILD develop slowly, while others progress more quickly. In many cases, the exact cause is unknown, but early diagnosis and treatment may help slow lung damage and improve breathing.
Several factors may increase the risk of developing ILD, including:
- Smoking or vaping
- Long-term exposure to dust, chemicals, or other airborne irritants
- Autoimmune conditions such as rheumatoid arthritis or scleroderma
- Certain medications or radiation treatments
- Family history of lung disease
Symptoms
Symptoms of interstitial lung disease can vary depending on the type and severity of the condition. Many people notice breathing problems that gradually become worse over time.
Common symptoms include:
- Shortness of breath, especially during activity
- A dry cough that does not go away
- Fatigue or low energy
- Reduced ability to exercise or stay active
- Unexplained weight loss
- Mild chest discomfort
How Is It Diagnosed?
Diagnosing interstitial lung disease usually starts with a review of your symptoms, health history, and possible environmental exposures. Your provider will also perform a physical exam and listen to your breathing.
Additional testing may include:
- Pulmonary function tests to measure lung capacity
- Chest X-rays or CT scans to look for inflammation or scarring
- Blood tests to check for autoimmune conditions or infection
- Bronchoscopy to examine the airways and collect samples
- Lung biopsy in certain situations when more information is needed
These tests help your care team identify the type of ILD and determine the best treatment approach.
How Is It Treated?
Treatment for interstitial lung disease depends on the cause and how advanced the condition is. The main goals are to slow lung damage, ease symptoms, and help you stay active.
Treatment may include:
- Medications to reduce inflammation or slow scarring
- Oxygen therapy to improve oxygen levels
- Pulmonary rehabilitation to strengthen breathing and endurance
- Quitting smoking and avoiding lung irritants
- Vaccines to help prevent respiratory infections
For advanced disease, lung transplantation may be considered. While existing scar tissue usually cannot be reversed, treatment can often help manage symptoms and improve quality of life.
