Which symptom is associated with severe physical effects of decompression?

Severe ear and sinus pain is a key symptom associated with the physical effects of decompression. When there is a rapid reduction in atmospheric pressure, as can occur at high altitudes or during rapid ascent in flight, the air trapped in body cavities (like the ears and sinuses) expands. This expansion can lead to intense pain and discomfort as the body struggles to equalize pressure. The structures in the ears—particularly the middle ear—and the sinuses can experience significant pressure differentials, resulting in severe pain.

This symptom is particularly associated with the physiological processes that occur during decompression, making it a clear indicator of the body's reaction to changes in pressure. The presence of severe pain in these areas can signal to crew members and medical personnel the need for immediate intervention to prevent further complications related to decompression sickness. Understanding this symptom allows for a better approach to managing situations involving rapid altitude changes, ensuring the safety and comfort of crew and passengers.