What should a diver do if they feel unwell while using EANx?

If a diver starts to feel unwell while using EANx (Enriched Air Nitrox), it is crucial to prioritize their safety. Instantly ascending and surfacing safely is the appropriate action because feeling unwell could indicate an increasing problem that may escalate if the dive continues. By ascending, the diver can more quickly reach a controlled environment where they can assess their condition and receive any necessary medical attention.

Continuing the dive while monitoring symptoms can delay necessary action if the situation worsens, and resting at the bottom does not provide any solutions or ease symptoms. Ignoring symptoms could lead to serious risks such as decompression sickness or other complications, which could endanger the diver's health. Prompt action by surfacing is the safest and most sensible approach to address any health concerns while diving.