Acclimatization & Sickness

Our trekking itineraries at Mountain Ascend Treks are carefully designed to allow enough time for acclimatization and prevent altitude sickness, as each person reacts differently to high altitudes. The best way to manage acclimatization and reduce sickness is to ascend slowly and spend extra days at higher elevations so your body can adjust naturally.

If you experience symptoms of Acute Mountain Sickness (AMS)—such as headache, nausea, dizziness, or fatigue—please inform your guide immediately. If you want to continue trekking despite feeling unwell, ask your guide to contact our Kathmandu office by phone or email. We will try to make necessary arrangements; however, please understand that finding another group or guide may take a few days.

All our trekking guides are Wilderness First Aid Certified and trained to handle altitude-related conditions. They carry pulse oximeters to regularly monitor your blood oxygen levels. If your guide believes continuing the trek is unsafe for your health, their decision is final. Please respect their judgment, as it is based on your safety and well-being.

For trekkers in the Annapurna region or Langtang region, the same safety procedures apply. Your guide should coordinate with our Kathmandu team for support. Be aware that additional fees and delays may occur, so we strongly recommend keeping at least three extra days in your travel plan or having flexible return flights.

We also advise purchasing travel insurance that covers high-altitude trekking and emergency evacuation. Consult your doctor about preventive medications like Diamox. Above all, listen to your body and remain flexible with your plans to ensure a safe and enjoyable trek.

For more information on altitude sickness, visit Altitude.org or the UIAA MedCom Guidelines. Your safety is our top priority—please take altitude seriously and trust your body’s signals.