Which of the following is not a symptom of decompression sickness?

Cyanosis, which presents as a bluish discoloration of the skin, is not typically associated with decompression sickness. Instead, it usually indicates a lack of oxygen in the tissues, which could result from other medical conditions but not directly from the symptoms of decompression sickness.

Decompression sickness, often a risk for divers ascending too quickly, is characterized by symptoms such as extreme fatigue, weakness, and neurological issues like tingling or numbness in the extremities. These symptoms are a result of gas bubbles forming in the body due to a rapid reduction in pressure. The presence of extreme fatigue and weakness can reflect a body struggling to adapt post-dive, while tingling or numbness may indicate neurological involvement from bubble formation in the nervous system.

Understanding the distinction between these symptoms is crucial for divers and aids in recognizing the signs of potential decompression sickness early, leading to prompt treatment.