The single most effective step you can take to prevent a spontaneous pneumothorax (collapsed lung) is to stop smoking, which lowers your recurrence risk by as much as 40%. Beyond that, prevention depends on whether you’ve never had one and want to reduce your odds, or you’ve already had one and want to stop it from happening again. Both situations have concrete, evidence-backed strategies.
Why Spontaneous Pneumothorax Happens
A primary spontaneous pneumothorax occurs without any obvious trigger in someone with no known lung disease. It typically affects tall, thin young people because of increased mechanical stress at the top of the lung, where shear forces are greatest. Smoking drives inflammation and oxidative stress in the small airways, which weakens the lung tissue and makes it more vulnerable to rupture.
A secondary spontaneous pneumothorax happens in someone who already has an underlying lung condition, most commonly COPD. Other associated diseases include asthma, cystic fibrosis, tuberculosis, sarcoidosis, pulmonary fibrosis, and certain infections. In both types, the basic event is the same: a small blister or weak spot on the lung surface tears open, allowing air to leak into the space between the lung and the chest wall.
Quit Smoking, Vaping, and Inhaled Drugs
Cigarette smoking is the most modifiable risk factor for spontaneous pneumothorax. Smokers have significantly more inflammatory cells in their small airways, which directly contributes to the kind of tissue damage that leads to a collapse. Quitting has been shown to reduce recurrence risk by up to 40%, making it far more impactful than most lifestyle changes.
Cannabis smoking and vaping carry their own risks. Inhaling through a resistive device (like a bong or vape pen) creates large swings in pressure inside the chest, which can cause direct trauma to the airways. E-cigarettes also expose lung tissue to nicotine and non-nicotine compounds that injure and inflame the airway lining. The body of literature linking vaping to pneumothorax is growing, and clinicians are increasingly advised to ask about e-cigarette use specifically when taking a smoking history. If you’ve had a collapsed lung or are at elevated risk, stopping all forms of inhaled substances is one of the clearest preventive steps available.
What to Do After Your First Episode
A first spontaneous pneumothorax carries a meaningful chance of happening again. Recurrence rates are high enough that most experts recommend pleurodesis, a procedure to seal the lung to the chest wall, after the second episode (meaning the first recurrence). The goal is to eliminate the space where air can accumulate.
There are two main approaches. Mechanical pleurodesis involves physically roughening the inner surface of the chest wall during a minimally invasive surgery so that the lung adheres to it as it heals. Chemical pleurodesis uses a substance (commonly medical-grade talc) inserted into the chest cavity to trigger inflammation that bonds the two surfaces together. Both methods require direct contact between the lung surface and the chest wall lining, and both are highly effective, with success rates estimated between 90% and 99%.
If you’ve had a single episode and your doctor recommends watchful waiting rather than immediate surgery, the lifestyle modifications in this article become your primary defense against recurrence.
Avoid Pressure Changes That Stress the Lungs
Rapid shifts in atmospheric pressure can expand trapped air pockets in the lung and trigger a collapse. Two situations stand out: flying and scuba diving.
After a pneumothorax has resolved, current guidance recommends waiting at least 7 days after a chest X-ray confirms full resolution before boarding a commercial flight. For a traumatic pneumothorax, the recommended wait is 2 weeks after radiographic resolution. Anyone with an untreated or unresolved pneumothorax should not fly at all.
Scuba diving poses a permanent concern for people with a history of spontaneous pneumothorax or with lung cysts that predispose them to one. The pressure changes during ascent can cause air trapped in a weakened area to expand rapidly, and the consequences underwater are far more dangerous than at altitude. If you have a genetic condition associated with lung cysts, such as Birt-Hogg-Dubé syndrome, avoiding scuba diving entirely is standard advice.
Ease Back Into Exercise Gradually
After an episode, most guidelines recommend avoiding heavy exercise for 4 to 6 weeks. That includes weight lifting, running, and swimming. The concern is that intense physical exertion increases pressure inside the chest, which could stress a healing lung. Walking and light daily activity are generally fine during recovery, but check with your treating physician about your specific timeline before ramping up intensity.
For long-term prevention, there’s no evidence that moderate exercise causes spontaneous pneumothorax in someone with fully healed lungs and no underlying disease. The restrictions are about protecting a recovering lung, not about lifelong avoidance of activity.
Know If You Have a Genetic Predisposition
Most spontaneous pneumothoraces are isolated events, but some people have an inherited tendency. Birt-Hogg-Dubé syndrome is the most well-characterized genetic condition linked to recurrent collapsed lungs. It’s caused by a mutation in the FLCN gene and also associated with certain skin growths (fibrofolliculomas) and kidney tumors.
Genetic testing may be worth pursuing if you have a family history of spontaneous pneumothorax occurring across multiple relatives in an autosomal dominant pattern (meaning it passes directly from parent to child). Other clues include multiple lung cysts found on imaging, especially if they’re located at the base of the lungs rather than the top, or a personal or family history of kidney tumors. A diagnosis of Birt-Hogg-Dubé changes the prevention calculus: patients with multiple lung cysts should be especially cautious with scuba diving, air travel, and any situation involving mechanical ventilation, since each of these exposures raises the risk of a new collapse.
Marfan syndrome and familial pneumothorax (where the tendency runs in families without a clear syndrome) are also recognized risk factors. If you’ve had a spontaneous pneumothorax and you’re tall and thin with joint hypermobility or a family history of aortic problems, discussing Marfan screening with your doctor is reasonable.
Managing Underlying Lung Disease
If your pneumothorax was secondary, meaning it occurred in the setting of existing lung disease, prevention centers on controlling that disease as aggressively as possible. For COPD, that means optimizing inhaler therapy, staying current on vaccinations to prevent lung infections, and avoiding irritants. For conditions like cystic fibrosis or pulmonary fibrosis, close management with a pulmonologist reduces the frequency of the lung damage events that make a collapse more likely.
Infections like pneumocystis pneumonia (common in people with poorly controlled HIV) and tuberculosis are both associated with secondary spontaneous pneumothorax. Keeping these infections treated or prevented through appropriate therapy removes a significant risk factor. In all cases, the underlying principle is the same: the healthier and less inflamed your lung tissue remains, the less likely it is to develop the weak spots that lead to air leaks.