Understanding Altitude and Travel Health
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Travelling to significantly higher altitudes than you are genuinely used to can cause altitude sickness, with symptoms including headache, nausea and general fatigue, even in otherwise perfectly healthy travellers who are not expecting any real issue at all beforehand. It can genuinely catch fit, healthy travellers by surprise.
Allowing time to acclimatise gradually, rather than pushing straight into strenuous activity immediately upon arrival at altitude, gives the body a considerably better chance to adjust without significant discomfort during the first day or two spent at height. Patience in the first day or two pays off considerably.
Staying genuinely well hydrated, avoiding alcohol in the first day or two at altitude, and recognising early symptoms rather than simply pushing through them, helps prevent a manageable issue from quietly becoming considerably more serious over a short time. Listening to your body matters more than pushing through discomfort.
Knowing when symptoms genuinely warrant descending to a lower altitude or seeking proper medical attention, rather than simply assuming they will pass on their own, is well worth understanding before undertaking any significant, genuinely high altitude travel. A cautious approach is always the safer choice at altitude.