Which of the following is NOT a sign or symptom of DCS?

Chest pain is not typically recognized as a common sign or symptom of decompression sickness (DCS). DCS primarily affects the tissues and can lead to a variety of symptoms, such as fatigue, joint and muscle pain, and visual disturbances.

Fatigue is often experienced after diving due to the physiological stresses of underwater conditions and may manifest as a result of DCS. Joint and muscle pain, commonly referred to as "the bends," is a classic symptom of DCS that occurs due to nitrogen bubbles forming in the joints or muscle tissues as divers ascend too quickly. Visual disturbances can also be a sign of DCS, indicating potential neurological involvement when bubbles affect the optic nerves or brain.

Chest pain is more commonly associated with other issues, such as cardiac problems or different types of physical stress, rather than being a classic indicator of DCS. Therefore, identifying it as not a typical symptom of DCS reflects an understanding of the condition's primary manifestations.