Pneumothorax: Collapsed Lung Symptoms and Treatment Choices

Pneumothorax, often called a collapsed lung, happens when air collects in the space between the lung and chest wall. Treatment depends on the size of the air leak, symptoms, overall health, and whether it is a first episode or a recurrence.

Overview

Pneumothorax is a condition in which air enters the pleural space, the thin area between the lung and the inside of the chest wall. This air can press on the lung and make it partly or, less commonly, completely collapse. Many people describe it as a collapsed lung, although the lung tissue itself is usually not damaged in the way the term may suggest.

A pneumothorax can be small and cause only mild symptoms, or it can be larger and make breathing uncomfortable. It may happen without a clear trigger, after a chest injury, during certain medical procedures, or in people who already have lung disease. Doctors classify it in several ways, including spontaneous, traumatic, iatrogenic, and tension pneumothorax.

The outlook is often good when pneumothorax is recognized and managed appropriately. The main goals of care are to relieve symptoms, remove trapped air when needed, allow the lung to re-expand, and reduce the chance of recurrence. The best treatment choice is individualized after clinical examination and imaging.

Types of Pneumothorax

A primary spontaneous pneumothorax occurs in a person without known lung disease. It is more often seen in tall, thin young adults and in people who smoke. It can occur when a small air-filled blister on the lung surface, often called a bleb, leaks air into the pleural space.

A secondary spontaneous pneumothorax occurs in someone with an existing lung condition, such as chronic obstructive pulmonary disease, asthma, cystic fibrosis, lung infections, interstitial lung disease, or certain cancers. Because the lungs may already have reduced reserve, symptoms can be more noticeable even when the pneumothorax is not very large.

Traumatic pneumothorax follows an injury such as a rib fracture, penetrating chest wound, or significant blunt trauma. Iatrogenic pneumothorax is related to a medical procedure, for example a lung biopsy, central venous catheter placement, or some types of mechanical ventilation. A tension pneumothorax is a special emergency form in which trapped air builds pressure and can affect the heart and major blood vessels; it requires urgent treatment.

Symptoms of a Collapsed Lung

Pneumothorax symptoms can start suddenly, often at rest, although they may also appear during activity. The most typical symptoms are sharp chest pain on one side and shortness of breath. The pain may worsen with deep breathing, coughing, or movement, and some people feel chest tightness rather than sharp pain.

Other possible symptoms include fast breathing, a rapid heartbeat, dry cough, fatigue, or discomfort in the shoulder or back. In a small pneumothorax, symptoms can be mild and may improve over time. In people with underlying lung disease, even a small air leak can cause more significant breathlessness.

Warning signs that need urgent medical attention include severe or worsening shortness of breath, fainting, blue lips or fingertips, confusion, marked weakness, very fast heartbeat, or low blood pressure. These may suggest a larger pneumothorax or, rarely, tension pneumothorax. Anyone with new sudden chest pain and breathing difficulty should be assessed promptly because several heart and lung conditions can feel similar.

Causes and Risk Factors

Pneumothorax happens when air escapes from the lung into the pleural space or enters through an opening in the chest wall. In spontaneous cases, the exact reason may not be obvious. Small blebs near the lung surface can rupture, allowing air to leak out until the opening seals.

Several factors can increase the risk of pneumothorax or recurrence. These include smoking, previous pneumothorax, family history, being tall and thin, and some inherited connective tissue conditions. Lung diseases such as COPD, emphysema, pneumonia, tuberculosis, cystic fibrosis, and interstitial lung disease can also raise the risk.

External causes include chest trauma, rib fractures, penetrating injuries, and pressure changes associated with certain activities. Scuba diving carries particular concern after pneumothorax because pressure changes can be dangerous if the condition recurs underwater. Air travel is usually delayed until the lung has fully re-expanded and a doctor has confirmed it is safe.

• Common risk factors include smoking and prior pneumothorax.
• Underlying lung disease can make symptoms more significant.
• Chest procedures and mechanical ventilation may rarely cause air leakage.
• High-pressure activities should be discussed with a specialist after recovery.

Diagnosis

Diagnosis begins with a medical history and physical examination. The doctor asks about symptom onset, chest pain, breathlessness, recent injury, procedures, smoking history, lung disease, and previous episodes. On examination, breath sounds may be reduced on the affected side, and breathing rate or oxygen levels may be checked.

A chest X-ray is the most common test used to confirm pneumothorax and estimate its size. In some cases, a computed tomography scan provides more detail, especially when the X-ray is unclear, the patient has complex lung disease, or doctors need to identify blebs, injuries, or another cause. Bedside ultrasound may also be helpful in emergency or intensive care settings.

Additional tests depend on the situation. Pulse oximetry measures blood oxygen level, and blood tests or an electrocardiogram may be used if symptoms could be related to other conditions. The diagnosis is not based on symptoms alone because chest pain and breathlessness can also occur with pulmonary embolism, heart problems, pneumonia, or musculoskeletal pain.

Treatment Options

Treatment depends on the size of the pneumothorax, symptoms, the patient’s lung health, and whether it is a first or repeat episode. A small pneumothorax in a stable patient may be managed with observation, rest, and repeat imaging. Supplemental oxygen may be used in some patients to support breathing and help air in the pleural space absorb more quickly.

If the pneumothorax is larger or causing significant symptoms, doctors may remove the air. This can be done with needle aspiration, in which a needle or small catheter is used to draw air out. Another option is chest tube drainage, where a tube is placed through the chest wall into the pleural space and connected to a drainage system until the air leak stops and the lung re-expands.

Some patients need surgery, especially if there is a persistent air leak, repeated pneumothorax, pneumothorax on both sides, or high-risk occupational or activity needs. Surgery is often performed using video-assisted thoracoscopic surgery, a minimally invasive technique. Procedures may include removing blebs and performing pleurodesis, which helps the lung surface adhere to the chest wall to reduce recurrence risk.

A tension pneumothorax is treated immediately because pressure in the chest can quickly interfere with breathing and circulation. Emergency decompression is followed by definitive chest tube placement. After any treatment, follow-up imaging is important to confirm that the lung has expanded and healing is progressing.

Recovery, Prevention and Self-Care

Recovery time varies. Some small pneumothoraces resolve over days to weeks, while larger cases or those requiring a chest tube or surgery may take longer. Patients should follow their doctor’s instructions about activity, wound care if a tube or surgery was used, pain control, and timing of follow-up chest imaging.

Smoking cessation is one of the most important steps to reduce the risk of another spontaneous pneumothorax. Patients should also avoid strenuous exercise, heavy lifting, and contact sports until cleared by a clinician. Air travel should be postponed until medical review confirms the pneumothorax has fully resolved; scuba diving usually requires specialist assessment and may not be recommended after spontaneous pneumothorax unless definitive preventive treatment has been performed.

Breathing should gradually become easier as the lung re-expands. A person should seek urgent care if chest pain or breathlessness returns, especially on the same side as a prior pneumothorax. Keeping follow-up appointments helps detect persistent air leaks, recurrence, or complications early.

When to See a Doctor

Medical evaluation is recommended for sudden chest pain, unexplained shortness of breath, or symptoms that feel similar to a previous pneumothorax. Even if symptoms are mild, imaging may be needed to confirm whether air is present around the lung. Early assessment helps doctors choose the safest level of care, from monitoring to urgent intervention.

Emergency care is needed for severe breathing difficulty, fainting, bluish skin or lips, confusion, rapidly worsening chest pain, or signs of shock such as extreme weakness or cold, clammy skin. These symptoms can occur with pneumothorax and other serious conditions, so prompt evaluation is important.

Patients with chronic lung disease, a history of pneumothorax, recent chest injury, or recent chest-related medical procedures should be especially cautious about new breathing symptoms. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals diagnose and treat pneumothorax and related lung conditions for international patients, using imaging, emergency care, pulmonology, and thoracic surgery when appropriate.

Frequently asked questions

Is pneumothorax the same as a collapsed lung?

Pneumothorax is commonly called a collapsed lung because air in the pleural space can make part or all of the lung collapse inward. The degree of collapse can range from very small to large. Doctors use imaging to determine its size and the best treatment approach.

Can a small pneumothorax heal on its own?

Yes, some small pneumothoraces in stable patients can heal with observation and follow-up imaging. The trapped air is gradually absorbed by the body as the leak seals. A doctor should still monitor the condition because symptoms and size can change.

How is pneumothorax treated in the hospital?

Hospital treatment may include oxygen, needle aspiration, or chest tube drainage to remove air and allow the lung to re-expand. If the air leak continues or pneumothorax recurs, surgery may be recommended. Treatment is tailored to the patient’s symptoms, imaging results, and underlying lung health.

What is a tension pneumothorax?

A tension pneumothorax occurs when air enters the pleural space and cannot escape, creating pressure in the chest. This can affect breathing and blood circulation. It is treated as an emergency with immediate decompression and usually chest tube placement.

Can pneumothorax come back?

Yes, recurrence is possible, especially after a spontaneous pneumothorax or in people who smoke or have underlying lung disease. The risk varies by individual and by treatment method. Doctors may discuss preventive options such as surgery or pleurodesis after repeated episodes or in higher-risk situations.

When can someone fly after pneumothorax?

Flying is usually delayed until the pneumothorax has completely resolved and a doctor confirms it is safe, typically with follow-up imaging. Cabin pressure changes can expand trapped air if pneumothorax is still present. Patients should ask their treating clinician for personalized timing, especially after chest tube treatment or surgery.

Is exercise safe after a collapsed lung?

Light activity may be allowed as symptoms improve, but strenuous exercise, heavy lifting, and contact sports should wait until medical clearance. The timing depends on the size of the pneumothorax, treatment used, and follow-up imaging. Returning gradually and reporting recurrent chest pain or breathlessness is important.

References

• British Thoracic Society
• American College of Chest Physicians
• Merck Manual Professional Edition
• National Heart, Lung, and Blood Institute
• European Respiratory Society

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.