What is a sign of mediastinal or subcutaneous emphysema?

A sign of mediastinal or subcutaneous emphysema is indicated by pain radiating to the shoulder or back. This type of pain occurs due to the pressure and irritation that arises when air leaks into the mediastinum or subcutaneous tissues, which can affect the surrounding structures, including nerves that may refer pain to areas like the shoulder or back.

Understanding how air pockets can influence pain perception is crucial in diagnosing these conditions. Mediastinal emphysema specifically can cause chest pressure and discomfort, which may manifest as referred pain, making it an important clinical sign to recognize.