Many of Nepal’s most beautiful treks climb well above 3,000 metres. At these heights the air holds less oxygen, and your body needs time to adapt. Understanding altitude sickness is the best way to enjoy your trek safely.
What is altitude sickness?
Acute mountain sickness (AMS) can affect anyone above about 2,500 m, regardless of age or fitness. Common symptoms are headache, nausea, loss of appetite, dizziness, tiredness and difficulty sleeping. In rare cases it can develop into serious conditions affecting the lungs (HAPE) or brain (HACE), which need immediate descent.
The golden rules
- Go slowly. Above 3,000 m, increase your sleeping altitude by no more than 300–500 m a day, and take a rest day every 1,000 m.
- Climb high, sleep low. Short hikes to a higher point on acclimatisation days help your body adapt.
- Drink plenty of water and avoid alcohol.
- Listen to your body and tell your guide about any symptoms straight away.
- Never go higher with symptoms. If they get worse, go down.
How we keep you safe
Our itineraries, such as the Everest Base Camp trek, include acclimatisation days at the right altitudes. Your guide checks how you feel and measures your oxygen level every day, carries a first-aid kit, and can arrange evacuation if needed. Talk to your doctor before your trip about whether medication is right for you.
Travel insurance matters
Make sure your insurance covers trekking to the maximum altitude of your trek, including helicopter evacuation. It is a requirement on all our treks, and it gives you peace of mind in the mountains.
