Pneumothorax

Overview

Pneumothorax is a condition in which air collects in the space between the lung and the chest wall. This space is normally very thin and helps the lung expand smoothly during breathing. When air enters this space, it can press on the lung and cause part or all of the lung to collapse.

A pneumothorax may be small and cause only mild symptoms, or it may be larger and lead to significant breathing difficulty. In some cases, pressure can build up quickly inside the chest and affect breathing and blood circulation. This is a medical emergency.

Pneumothorax can occur in people with healthy lungs, in those with existing lung disease, or after an injury or medical procedure. With timely medical assessment and appropriate care, many people recover well, although follow-up is important to monitor lung healing and reduce the risk of recurrence.

Symptoms

Symptoms of pneumothorax can appear suddenly. The severity often depends on how much air has collected and whether there is an underlying lung condition.

• Sudden sharp chest pain, often on one side
• Shortness of breath or difficulty breathing
• Chest tightness or discomfort
• Rapid breathing
• Fast heartbeat
• Feeling unusually tired, weak, or lightheaded
• Dry cough in some cases

Some small pneumothoraces may cause very mild symptoms or may be found during imaging done for another reason. However, sudden chest pain or breathing difficulty should always be assessed by a healthcare professional.

Severe symptoms may include worsening breathlessness, bluish lips or skin, fainting, confusion, or severe chest pressure. These signs require urgent medical attention.

Causes and Risk Factors

Pneumothorax can develop for several reasons. In some people, it occurs without a clear trigger. In others, it is related to lung disease, trauma, or a medical procedure.

• Spontaneous pneumothorax: This can occur suddenly, sometimes due to the rupture of a small air-filled area on the lung surface.
• Underlying lung disease: Conditions that damage lung tissue can increase the risk, including chronic lung diseases, infections, or inflammatory lung conditions.
• Chest injury: A blunt or penetrating injury to the chest may allow air to enter the space around the lung.
• Medical procedures: Some procedures involving the chest, lungs, or placement of central lines may occasionally lead to pneumothorax.
• Mechanical ventilation: Breathing support with positive pressure can increase the risk in certain patients.

Risk factors may include smoking, a previous pneumothorax, certain body types, family history, and activities or environments involving major pressure changes, such as diving or high-altitude exposure. Not everyone with these risk factors will develop pneumothorax, and it can occur in people without obvious risks.

Diagnosis

Diagnosis begins with a medical assessment, including questions about symptoms, medical history, recent injuries, procedures, and lung conditions. The doctor may listen to the chest with a stethoscope to check for reduced or unequal breath sounds.

Imaging is usually needed to confirm pneumothorax and estimate its size. A chest X-ray is commonly used. In some situations, ultrasound or computed tomography may be recommended, especially if the diagnosis is unclear or if there are other chest injuries or lung conditions to evaluate.

Additional tests may be performed to assess breathing and overall condition. These may include measuring oxygen levels in the blood, checking vital signs, or blood tests when needed. The choice of tests depends on the person’s symptoms and clinical situation.

A key part of diagnosis is determining whether the pneumothorax is small or large, stable or worsening, and whether there are signs of pressure affecting the heart and circulation. This helps guide the urgency and type of treatment.

Treatment Options

Treatment depends on the size of the pneumothorax, the severity of symptoms, the person’s overall health, and whether there is an underlying lung condition. The goal is to remove or allow absorption of the trapped air, help the lung re-expand, and prevent complications.

• Observation: A small pneumothorax with mild symptoms may be monitored closely. Follow-up imaging may be used to confirm that the air is being absorbed and the lung remains stable.
• Oxygen support: Some patients may receive oxygen in a healthcare setting to support breathing while the lung heals.
• Air removal: If the pneumothorax is larger or symptoms are more significant, a doctor may remove air from the chest space using a medical procedure.
• Chest tube placement: A tube may be placed into the chest to drain air and allow the lung to re-expand. The tube is monitored and removed when appropriate.
• Surgical treatment: Surgery may be considered for recurrent pneumothorax, persistent air leakage, or certain higher-risk situations. The surgical approach depends on the individual case.

Patients are usually advised to avoid air travel, diving, and strenuous activities until a doctor confirms that the pneumothorax has resolved and it is safe to resume these activities. Follow-up care is important, especially for people who have had pneumothorax before or who have existing lung disease.

When to See a Doctor

Seek medical care promptly if you develop sudden chest pain, shortness of breath, or unexplained chest tightness, especially if symptoms occur on one side or begin suddenly. These symptoms can have several causes, and a healthcare professional should evaluate them.

Call emergency services or go to the nearest emergency department if breathing difficulty is severe, symptoms are getting worse, you feel faint or confused, or your lips or skin appear bluish. These may be signs of a serious pneumothorax or another urgent condition.

If you have previously had a pneumothorax, have a known lung condition, or recently experienced chest trauma or a chest-related medical procedure, do not ignore new breathing symptoms. Early assessment helps guide safe and appropriate care.