Preventing a collapsed lung depends on whether you’ve already had one or you’re trying to avoid a first episode. The single most effective step is quitting smoking, which reduces the risk of recurrence by roughly four-fold. Beyond that, prevention involves managing underlying lung conditions, avoiding specific high-risk activities, and in some cases, surgical intervention to keep the lung from collapsing again.
Why Lungs Collapse in the First Place
A collapsed lung, or pneumothorax, happens when air leaks into the space between your lung and chest wall. That trapped air pushes on the lung from the outside, causing it to partially or fully deflate. There are two main types. A primary spontaneous pneumothorax strikes people with no known lung disease, often young, tall, thin males. A secondary spontaneous pneumothorax occurs in people who already have a lung condition like COPD, asthma, cystic fibrosis, or interstitial lung disease.
In the primary type, tiny air-filled blisters called blebs form near the top of the lung and can rupture without warning. Smoking appears to cause this by trapping gas in the small airways, creating pockets of hyperinflation that put excess pressure on delicate lung tissue. Even in smokers with otherwise normal lung function, the cumulative number of pack-years smoked is directly associated with pneumothorax risk.
Quit Smoking and Avoid Vaping
Smoking is the most controllable risk factor. In a study of spontaneous pneumothorax patients, smoking had a statistically significant effect on recurrence after treatment. Patients who quit smoking after their first episode had a four-fold reduction in recurrence risk compared to those who kept smoking. That’s a dramatic difference for a single lifestyle change.
Emerging evidence also links electronic cigarettes to recurrent pneumothorax in young adults. Current clinical guidelines recommend that anyone who has experienced a spontaneous pneumothorax avoid both smoking and vaping entirely.
How Likely Is a Second Collapse?
Recurrence is common enough to take seriously. Reported recurrence rates for primary spontaneous pneumothorax range from about 8% to 52%, depending on the study and follow-up period. British Thoracic Society guidelines cite a 54% recurrence risk within the first four years. Most recurrences happen fast: in one surgical study, about 78% of repeat episodes occurred within three months of discharge, and 94% within six months.
For secondary spontaneous pneumothorax, recurrence rates are similarly high, ranging from 23% to 47%. The underlying lung disease makes the tissue more fragile and more prone to repeat air leaks, which is why doctors treat these cases more aggressively from the start.
Surgical Options to Prevent Recurrence
When a collapsed lung keeps coming back, or when the initial episode doesn’t resolve on its own, surgery is the most effective way to prevent future episodes. The standard approach uses video-assisted thoracoscopic surgery (VATS), a minimally invasive procedure where a surgeon removes the blebs or blisters responsible for the air leak, then roughens or coats the lung’s outer surface to encourage it to adhere permanently to the chest wall. This adhesion process is called pleurodesis.
Guidelines from both American and British thoracic societies recommend surgical pleurodesis for primary spontaneous pneumothorax after a second episode or when an air leak persists beyond four days. For secondary spontaneous pneumothorax, intervention is recommended after the very first episode because the recurrence risk is higher and the consequences more dangerous.
The numbers strongly favor surgery. Patients treated with a chest tube alone have recurrence rates between 26% and 50%. When VATS is combined with a pleurodesis agent like medical-grade talc, recurrence drops to between 0% and 3.2%. Even without an added agent, surgery alone significantly lowers the odds of another collapse. Other agents used during surgery, such as minocycline, show similarly low recurrence rates of 0% to 2.9%.
Managing Underlying Lung Disease
If you have a condition like COPD, asthma, or cystic fibrosis, keeping that disease well controlled is a form of pneumothorax prevention. Secondary spontaneous pneumothorax is directly tied to the structural damage these conditions cause. Poorly managed COPD, for example, leads to the kind of air trapping and tissue breakdown that makes lung collapse more likely.
Because secondary pneumothorax carries higher mortality risk, clinical guidelines advise against a “wait and see” approach. Observation alone is not recommended. If you have known lung disease and experience sudden chest pain or shortness of breath, that warrants urgent evaluation.
Genetic Conditions That Raise Risk
Several inherited syndromes make pneumothorax more likely, sometimes as one of the first noticeable symptoms. The most well-known include Birt-Hogg-Dubé syndrome, Marfan syndrome, vascular Ehlers-Danlos syndrome, alpha-1 antitrypsin deficiency, and tuberous sclerosis complex. These conditions affect connective tissue or lung structure in ways that make the tissue more vulnerable to rupture.
Identifying these syndromes matters because they carry other serious health risks. Birt-Hogg-Dubé syndrome, for instance, increases the risk of kidney tumors, making imaging surveillance critical. If you’ve had a spontaneous pneumothorax and also have a family history of collapsed lungs, connective tissue problems, or unusual skin findings, genetic evaluation can uncover a treatable underlying cause and guide long-term monitoring.
Activities and Environments to Avoid
Certain activities create pressure changes inside the chest that can trigger or worsen a pneumothorax. After a resolved episode, guidelines recommend avoiding the following for at least seven days after imaging confirms full re-expansion: contact sports, heavy lifting, strenuous exercise, high-altitude activities, and flying.
Air travel deserves special attention. Commercial aircraft cabins are pressurized to an equivalent altitude of about 6,000 to 8,000 feet, which causes any trapped gas in the chest to expand. Most medical societies recommend waiting at least two weeks after radiographic confirmation that the lung has fully re-inflated before boarding a flight. Flying too soon risks turning a small residual air pocket into a dangerous re-collapse at altitude, far from medical care.
Scuba diving is the highest-risk activity. The pressure changes during ascent can cause catastrophic lung expansion. Diving is considered contraindicated unless you’ve had definitive surgical treatment like pleurodesis. Even after surgery, the decision to return to diving should involve a thoracic specialist. For anyone with a history of spontaneous pneumothorax who hasn’t had surgery, diving is simply off the table.
Practical Steps If You’re at Higher Risk
If you’re tall, thin, male, and in your teens or twenties, you fit the classic profile for primary spontaneous pneumothorax. You can’t change your body type, but you can avoid the factors that stack on top of that baseline risk. Not smoking is the most important. Avoiding recreational drugs that involve deep inhalation (like cannabis or nitrous oxide) also removes a potential trigger.
If you’ve already had one episode, take recurrence seriously given the high rates in the first six months. Know the warning signs: sudden, sharp chest pain on one side and difficulty breathing. Avoid travel to remote areas where medical care isn’t accessible during that high-risk window. And if your doctor discusses surgical prevention after a second episode, the evidence strongly supports it as the most reliable way to keep your lung from collapsing again.