What visual symptom may indicate the need for treatment of decompression sickness?

In the context of decompression sickness, immediate pain is a key visual symptom that can indicate a need for treatment. This pain often manifests in the joints and can be sudden and severe, sometimes referred to as "the bends." When divers ascend too quickly, nitrogen bubbles can form in the bloodstream and tissues, causing various symptoms, including significant pain.

Although blurry vision, sudden loss of dexterity, and high fever can be associated with different medical conditions or complications, they are not as directly correlated to the urgent need for treatment specifically concerning decompression sickness. Immediate pain is a classic sign that requires prompt attention to address the potential risks to the diver's health and ensure proper treatment, such as the use of recompression therapy. Recognizing this symptom allows for timely intervention, which is crucial for preventing further complications associated with the condition.