3 doctors weighed in:

What causes a collapsed lung? Can this just happen out of the blue or are there specific behaviors or conditions that cause this?

3 doctors weighed in
Dr. Geoffrey Rutledge
Internal Medicine
1 doctor agrees

In brief: A

A collapsed lung - also referred to as a pneumothorax in the medical literature - arises when the outer surface of the lung develops a "puncture" causing the lung to deflate.
A pneumothorax can develop in certain medical conditions where the lungs are diseased and prone to developing a "puncture" --e.g. Asthma, cystic fibrosis, and emphysema and is more common in smokers. Sometimes a pneumothorax arises when there is no apparent underlying lung disease. This is referred to as a primary spontaneous pneumothorax and is typically seen in young, thin men. Sometimes having a family history of a collapsed lung can suggest a cause, and there are some rare inherited diseases such as marfan's syndrome in which a collapsed lung can occur out of the blue. Stopping smoking is the only specific behavior that will significantly reduce your chance of developing a collapsed lung.

In brief: A

A collapsed lung - also referred to as a pneumothorax in the medical literature - arises when the outer surface of the lung develops a "puncture" causing the lung to deflate.
A pneumothorax can develop in certain medical conditions where the lungs are diseased and prone to developing a "puncture" --e.g. Asthma, cystic fibrosis, and emphysema and is more common in smokers. Sometimes a pneumothorax arises when there is no apparent underlying lung disease. This is referred to as a primary spontaneous pneumothorax and is typically seen in young, thin men. Sometimes having a family history of a collapsed lung can suggest a cause, and there are some rare inherited diseases such as marfan's syndrome in which a collapsed lung can occur out of the blue. Stopping smoking is the only specific behavior that will significantly reduce your chance of developing a collapsed lung.
Dr. Geoffrey Rutledge
Dr. Geoffrey Rutledge
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In brief: Lots

It can happen spontaneously or underlying conditions include trauma, infection, cancer , copd.

In brief: Lots

It can happen spontaneously or underlying conditions include trauma, infection, cancer , copd.
Dr. Terry Simpson
Dr. Terry Simpson
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