What is the recommended action if a diver suspects they have decompression sickness?

When a diver suspects decompression sickness, the recommended action is to breathe 100% oxygen and contact emergency medical care. This is crucial because decompression sickness can occur when a diver ascends too quickly, causing nitrogen bubbles to form in the body due to rapid pressure changes. Breathing pure oxygen helps to eliminate nitrogen from the system more efficiently and can alleviate symptoms.

Providing 100% oxygen allows for the reduction of nitrogen bubbles, as it enhances the body's ability to metabolize and remove the nitrogen that has formed in tissues. It also helps to reduce the risk of further complications while waiting for medical assistance.

Swift action is vital in these scenarios because decompression sickness can progress and cause more severe health issues if not treated promptly. Contacting emergency medical professionals ensures that the diver receives proper treatment, which may include hyperbaric oxygen therapy, the most effective way to treat this condition.

While resting and monitoring symptoms or ascending slowly may seem like reasonable actions, they do not address the immediate need for medical evaluation and treatment that is critical in cases of decompression sickness. Continuing to dive is highly discouraged, as it can exacerbate the situation and lead to more serious consequences.