What should a diver do if they feel uncomfortable or unwell underwater?

When a diver feels uncomfortable or unwell underwater, the most prudent action is to signal their buddy and ascend calmly. Communication is crucial in diving, and signaling the buddy ensures that both divers are aware of the situation and can assist each other. A calm ascent is essential for safety; it allows the diver to manage any potential issues, such as decompression sickness, that can result from ascending too quickly.

Delaying action by pushing through discomfort, ignoring it until the dive ends, or rapidly swimming to the surface can increase the risk of serious complications. Properly addressing any discomfort by ascending slowly with a buddy maximizes safety and minimizes the chance of exacerbating the situation.