When you observe moderate or severe symptoms of altitude sickness in any of your group members, try to have an open discussion. Make the climber and your guide aware of what you’re observing.
Understand that there are different dynamics at play and remember that the affected climber may not always be in a position to act in their own best interests. Both your guide and the climber may be reluctant to agree on descent.
If this is the case, then try to keep calm and stay factual. Make sure the climber understands that you are concerned about their safety. At the same time, understand that the final decision will rest with the guide.
With the necessary training and experience, having led many climbs and observed many different instances of altitude sickness in others, your guide will know best whether it is safe for the affected climber to continue.
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