The short answer
It can cause trouble. At about 3,800 m altitude sickness is possible, especially if you arrive fast by flight or helicopter. Go slowly, drink water and descend if symptoms worsen.
Key facts
- Altitude
- About 3,800 m
- Warning signs
- Headache, nausea, dizziness
- Remedy
- Rest and descend
- Risk groups
- Heart, lung and blood-pressure conditions
How it works
- Arrive and restStay at Jomsom for the first night if you can. Slow arrival reduces risk.
- Hydrate and eat lightlyWater and warm drinks, no alcohol on arrival.
- Watch for warning signsHeadache that worsens, nausea, confusion, or breathlessness at rest mean going down.
Taking altitude seriously
Flying or driving straight to about 3,800 m gives the body little time to adjust, so even fit travellers can feel headache, nausea or breathlessness. Rest on arrival, drink water, eat lightly and sleep as low as you reasonably can.
People with heart, lung or blood-pressure problems should talk to a doctor before booking.
If you feel unwell
Tell your guide early. Mild symptoms may ease with rest, but worsening symptoms mean descending. Do not take sleeping pills or alcohol. See high altitude care.
Insider tip
Rest on the first day. Many problems come from rushing.
Avoid this
Do not drink alcohol on arrival. See travel insurance for altitude cover.
Related questions
Is the altitude dangerous?
For healthy adults it is usually manageable if you go slowly. People with heart or lung problems should consult a doctor.
Should I take medicine?
Ask your doctor before you travel; do not self-prescribe.
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