Understanding Interstitial Lung Disease: When Lung Tissue Becomes Inflamed and/or Scarred
If you've been diagnosed with interstitial lung disease (ILD) or your healthcare provider suspects you may have it, you may wonder what it means and how it can affect your breathing. ILD refers to a group of conditions that cause inflammation or scarring of the lung tissue.
What Is Interstitial Lung Disease?
Interstitial lung disease is a group of more than 200 conditions that affect the interstitium, the tissue surrounding the air sacs in the lungs. Inflammation or scarring can make the lungs stiff and make it harder for oxygen to move into the bloodstream.
Some types of ILD have a known cause, while others have no identifiable cause.
What Causes ILD?
ILD can develop for several reasons, including:
Autoimmune diseases, such as rheumatoid arthritis or scleroderma
Long-term exposure to dust, mold, or chemicals
Certain medications
Radiation therapy
Smoking
Other underlying medical conditions
In some cases, the cause remains unknown. This is called idiopathic interstitial lung disease.
What Are the Symptoms?
Symptoms can develop gradually and may include:
Shortness of breath, especially during activity
Persistent dry cough
Fatigue
Reduced ability to exercise
Unexplained weight loss
Because these symptoms can resemble other lung conditions, testing is often needed to determine the cause.
How Is ILD Diagnosed?
Your healthcare provider may use several tests to evaluate your lungs, including:
Chest X-ray or high-resolution CT scan
Pulmonary function tests
Blood tests
Measurement of oxygen levels
Bronchoscopy or lung biopsy in certain cases
Your provider may also ask about other information, such as your medications, medical history, and exposure to dust, mold, or other substances.
How Is ILD Treated?
Treatment depends on the specific type and cause of ILD. Options may include:
Medications to reduce inflammation or slow lung scarring
Supplemental oxygen
Pulmonary rehabilitation
Treating an underlying autoimmune disease or other condition
Lung transplantation in severe cases
Not every person with ILD needs the same treatment. Your healthcare provider will create a treatment plan based on your specific condition.
Living With ILD
While some types of ILD can be managed but not cured, treatment and regular monitoring can help slow disease progression and maintain quality of life.
You can support your lung health by:
Avoiding smoking and secondhand smoke
Taking medications as prescribed
Staying physically active as recommended
Avoiding known environmental or occupational exposures
Attending regular follow-up appointments
Frequently Asked Questions
Is ILD contagious?
No. ILD is not contagious and cannot be spread from person to person.
Can ILD be cured?
Some types of ILD can improve when the underlying cause is treated. Other forms may cause permanent scarring and cannot be reversed. Treatment can often help manage symptoms and slow progression.
Is ILD the same as COPD?
No. ILD and COPD are different groups of lung diseases. ILD primarily affects the lung tissue and can cause scarring, while COPD primarily causes airflow limitation and damage to the airways and air sacs.
The Bottom Line
Interstitial lung disease is a group of conditions that can cause inflammation or scarring of the lungs. Because ILD has many different causes and forms, early evaluation and regular monitoring are important. With appropriate treatment and follow-up, many people with ILD can manage their symptoms and maintain their quality of life.
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