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- DictionaryPneu·mo·ni·tis/ˌno͞oməˈnīdəs/
noun
- 1. inflammation of the walls of the alveoli in the lungs, usually caused by a virus.
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Pneumonitis
Pneumonitis (noo-moe-NIE-tis) is a general term that refers to swelling and irritation, also called inflammation, of lung tissue. Lung infections such as pneumonia also can cause lung tissue to become inflamed. But pneumonitis generally refers to inflamed lung tissue not caused by an infection.
Pneumonitis is a result of an extra strong defense response by the body's immune system to an irritating substance. Common causes of pneumonitis include airborne irritants at a job, in the home or from hobbies. Other causes include some ca...
When to seek medical or mental health expertAlways seek the advice of your physician or other qualified health provider with any questions you may have regarding your health. Never disregard professional medical advice or delay in seeking it because of something you have read on the community.Symptoms of pneumonitis may develop quickly or slowly and can worsen over time. At times symptoms may suddenly get worse or better. Also, symptoms vary greatly among people with the condition and include:
- Trouble breathing.
- Dry cough that usually doesn't bring up any mucus.
- Extreme tiredness.
- Loss of appetite.
- Fever....
Pneumonitis happens when an irritating substance causes inflammation in the tiny air sacs called alveoli in your lungs. Inflamed lung tissue makes it hard for oxygen to pass through the alveoli into the bloodstream.
Many causes have been linked to pneumonitis. But it's not clear why some people have a strong immune system response to certain substances that cause pneumonitis, while others do not. For many people, the specific substance causing the inflammation is never identified....
Treatment may depend on the cause of pneumonitis.
Hypersensitivity pneumonitis
If you have pneumonitis caused by chemical irritation or an allergic reaction, your healthcare professional will likely recommend stopping the exposure that's irritating your lungs. This step should help lessen your symptoms.
Ways you can lower exposure include:
- Avoiding the triggering substance, if known. This may even mean choosing a different job or hobby if your condition is ...
For informational purposes only and not a substitute for professional medical advice, diagnosis, or treatment.
© Mayo Clinic
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