Many: it could be infection, inflammation, autoimmune process, malignancy, other benign tumor etc.
Answered 6/25/2014
3.9k views
Smoking: check on google. There are too many things that can do it. Most importantly, smoking. Check with your lung doc to know for sure. Lung nodules can be life threatening.
Answered 2/8/2020
3.8k views
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