The interstitium is a lace-like network of tissue that extends throughout both lungs. The interstitium provides support to the lungs' microscopic air sacs (alveoli). Tiny blood vessels travel through the interstitium, allowing gas exchange between blood and the air in the lungs. Normally, the interstitium is so thin it can't be seen on chest X-rays or CT scans.
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Your bronchial tubes, which carry air to your lungs, can get infected and swollen. This is called bronchitis. When you’ve got it, you probably have a bad cough, lots of mucus, and maybe some general cold symptoms like body aches or chills.
In some cases, you might get medicine from your doctor. But more often you’ll just have to ride it out. As you do that, some good old-fashioned self-care can help you feel better.
All forms of interstitial lung disease cause thickening of the interstitium. The thickening can be due to inflammation, scarring, or extra fluid (edema). Some forms of interstitial lung disease are short-lived; others are chronic and irreversible.
Some of the types of interstitial lung disease include:
Interstitial pneumonia: Bacteria, viruses, or fungi may infect the interstitium of the lung. A bacterium called Mycoplasma pneumonia is the most common cause.
Asbestosis: Interstitial lung disease caused by asbestos exposure.
Causes of Interstitial Lung Disease
Bacteria, viruses, and fungi are known to cause interstitial pneumonias. Regular exposures to inhaled irritants at work or during hobbies can also cause some interstitial lung disease. These irritants include:
Coal dust, or various other metal dusts from working in mining
Grain dust from farming
Bird proteins (such as from exotic birds, chickens, or pigeons)