Which symptom is NOT related to a simple pneumothorax?

A simple pneumothorax occurs when air enters the pleural space – the area between the chest wall and the lung – leading to partial or complete collapse of the lung. The symptoms associated with this condition typically include sudden, sharp chest pain, especially on the affected side, labored breathing, and shortness of breath, which occur due to the lung's inability to expand fully or function properly.

Blue discoloration of the skin, often referred to as cyanosis, indicates a lack of sufficient oxygen in the blood. While it can occur with more severe respiratory distress or other complications that could arise from a pneumothorax, it is not a standard symptom of a simple pneumothorax itself. Thus, while sudden chest pain, labored breathing, and shortness of breath are common and expected symptoms of a simple pneumothorax, cyanosis suggests a more severe condition or systemic issue.