Which of the following is NOT a sign of decompression sickness?

Decompression sickness, also known as "the bends," is a condition that can occur when a diver ascends too quickly, causing nitrogen bubbles to form in the body. Recognizing the signs and symptoms of this condition is crucial for divers.

Joint pain, breathing difficulties, and confusion are commonly reported symptoms of decompression sickness. Joint pain is one of the classic signs that divers often experience, particularly in the elbows and knees. Breathing difficulties can occur when nitrogen bubbles affect the lungs, leading to issues like pulmonary barotrauma or other respiratory problems. Confusion can result from the neurological effects of these bubbles when they interrupt normal blood flow or create pressure on the brain.

On the other hand, skin rashes are not typically associated with decompression sickness. While skin symptoms can occur due to other diving-related conditions, they do not directly indicate decompression sickness itself. Therefore, recognizing that skin rashes do not fit within the established signs of this condition makes it clear why this option is the correct response to the question. Understanding these distinctions enhances a diver's ability to identify and respond to potential emergencies effectively.