What is the most commonly reported symptom of decompression sickness (DCS)?

The most commonly reported symptom of decompression sickness (DCS) is pain. This pain, often referred to as "the bends," typically occurs in the joints and muscles. It is thought to be caused by the formation of nitrogen bubbles in the tissues that result from a rapid decrease in pressure, which occurs when a diver ascends too quickly after spending time at significant depths.

The pain can vary in intensity and may resemble that of a deep ache or sharp discomfort, leading to significant distress for the affected individual. Although other symptoms such as dizziness, nausea, and fatigue can also occur, pain is usually the first and most prominent symptom reported by individuals experiencing DCS. Understanding this helps divers and rescue personnel recognize the condition quickly, enabling prompt treatment and minimizing potential complications.