All medical information on this page is summarized from reputable sources, including the Children’s Hospital of Philadelphia, Cleveland Clinic, the Mayo Clinic, the American Lung Association, MedlinePlus Genetics, Radiopaedia, Ada Health, peer-reviewed literature, and other referenced materials. This content is intended for general information only and should not replace professional medical advice. For full source details and further reading, please visit the reference section at the bottom of this page.
What Is a Spontaneous Pneumothorax?
A spontaneous pneumothorax is a sudden lung collapse that occurs without a chest injury or known lung disease. It happens when air leaks into the space between the lung and the chest wall, creating pressure that prevents the lung from expanding normally. This leak often comes from the rupture of a small air filled bleb on the lung surface, which allows air to escape into the chest cavity. Small collapses may resolve on their own, while larger ones can lead to significant symptoms and require medical treatment.
What Causes a Pneumothorax?
A spontaneous pneumothorax can happen without a clear trigger. A primary spontaneous pneumothorax occurs in otherwise healthy people and is most common in young, tall, thin men. Smoking greatly increases risk. It is usually caused by the rupture of small blebs on the lung surface.
A secondary spontaneous pneumothorax occurs because of underlying lung disease, such as COPD, asthma, cystic fibrosis, or pneumonia.
Other risk factors include smoking, connective tissue disorders like Marfan syndrome, and sudden pressure changes from activities such as scuba diving or high altitude exposure.
Symptoms to Look For
Symptoms of a spontaneous pneumothorax usually begin suddenly and can range from mild to severe. Common signs include:
Sharp, one-sided chest pain, often worse with deep breaths or coughing
Shortness of breath, from mild discomfort to difficulty breathing even at rest
Rapid breathing or a fast heart rate as the body tries to compensate
Fatigue or lightheadedness due to reduced oxygen levels
Bluish lips or nails in severe cases, which is a medical emergency
Dry cough, sometimes triggered by irritation from the collapse
If sudden chest pain and shortness of breath occur, seek medical care immediately. A collapsed lung can become serious quickly and requires prompt evaluation in an emergency department.
Diagnosis
Diagnosis begins with a physical exam. A doctor listens for reduced or absent breath sounds on one side and may tap on the chest to check for a hollow sound that suggests trapped air.
The main diagnostic test is a chest X-ray, which quickly shows air in the pleural space and how much of the lung has collapsed. If the X-ray is unclear or the pneumothorax is very small, a CT scan may be used for a more detailed view. In emergency settings, ultrasound can also identify a pneumothorax quickly.
Doctors may check oxygen levels with a pulse oximeter or an arterial blood gas test to see how much the collapse is affecting breathing. Once confirmed, the medical team evaluates the size of the pneumothorax and determines the best treatment plan.
Treatment and Recovery
Treatment focuses on re-expanding the lung and removing trapped air.
Observation: Small pneumothoraxes with mild symptoms may heal on their own. Oxygen and follow-up X-rays are used to ensure improvement.
Needle Aspiration or Chest Tube: Larger collapses or significant symptoms often require removing air with a needle or a chest tube. The tube stays in place until the leak stops and the lung fully expands.
Pleurodesis: If the pneumothorax recurs or the air leak continues, doctors may seal the pleural space with talc, medicine, or a blood patch to prevent future collapses.
Surgery: Minimally invasive surgery (VATS) may remove or repair leaking blebs and is often combined with pleurodesis. Surgery greatly reduces recurrence.
Most people recover fully. Small collapses heal within one to two weeks. Larger ones that require a chest tube or surgery take longer and usually involve a short hospital stay.
Avoid flying for one to two weeks and avoid scuba diving unless surgically treated. Quitting smoking is strongly recommended because it greatly lowers recurrence risk.
Follow-up visits and imaging confirm healing. Recurrence happens in about 10 to 30 percent of cases, but most people return to normal activities once the lung has re-expanded and symptoms resolve.
PneumoStrong was created to support anyone experiencing a spontaneous pneumothorax by providing clear information, evidence-based resources, and a compassionate community. Founded by someone who has lived through a collapsed lung, we focus on simplifying medical details, sharing real patient stories, and offering guidance that helps you feel informed and supported throughout recovery. Our goal is to ensure no one faces a pneumothorax alone.
Download our free Pneumothorax Quick Facts PDF below.
Children’s Hospital of Philadelphia. (2023). Spontaneous pneumothorax. https://www.chop.edu/conditions-diseases/spontaneous-pneumothorax
Cleveland Clinic. (2023). Collapsed lung (pneumothorax). https://my.clevelandclinic.org/health/diseases/15304-collapsed-lung-pneumothorax
Gallo de Moraes, A., & Lackey, E. (2022). Spontaneous pneumothorax: Epidemiology, pathophysiology and cause. Frontiers in Medicine, 9, 853838. https://doi.org/10.3389/fmed.2022.853838
Lung Association. (2023). Learn about pneumothorax. https://www.lung.org/lung-health-diseases/lung-disease-lookup/pneumothorax/learn-about-pneumothorax
Mayo Clinic. (2023). Pneumothorax: Diagnosis and treatment. https://www.mayoclinic.org/diseases-conditions/pneumothorax/diagnosis-treatment/drc-20350372
MedlinePlus Genetics. (2023). Primary spontaneous pneumothorax. https://medlineplus.gov/genetics/condition/primary-spontaneous-pneumothorax/
Radiopaedia.org. (2024). Pneumothorax. https://radiopaedia.org/articles/pneumothorax
Ada Health. (2023). Pneumothorax symptoms and treatment. https://ada.com/conditions/pneumothorax/
All information in this series is reviewed and informed by current research and verified patient experiences. We encourage you to explore, reflect, and apply what feels right for your own recovery journey. PneumoStrong does not provide medical advice. All content is for educational purposes and reflects patient experiences and scientific research.