Pneumothorax (Collapsed Lung)
Air leaks into the space around the lung, causing it to collapse partly or fully. It can happen suddenly and causes sharp chest pain and breathlessness.
Causes & risk factors
- Spontaneous rupture of a small air sac (often in tall, thin young people)
- Chest injury or rib fracture
- Underlying lung disease
- Medical procedures on the chest
- Smoking
Common symptoms
Tests & diagnosis
- Chest X-ray
- CT scan of chest
- Oxygen level (pulse oximetry)
Treatment & management
- Observation and oxygen for small collapses
- Removing the air with a needle or chest tube
- Surgery to prevent recurrence in repeated cases
- Stopping smoking to lower recurrence risk
When to see a doctor urgently
- Call emergency services for sudden severe breathlessness with chest pain
- Seek urgent care if breathing worsens quickly
- See a doctor for chest pain after an injury
Not a diagnosis. MedDroid gives general educational information about pneumothorax (collapsed lung). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Can a collapsed lung reinflate on its own?
A small pneumothorax may reinflate with observation, but larger ones usually need the air removed.
Can it happen again?
Yes, recurrence is possible; surgery can reduce this risk in repeated cases.
Explore more
MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.