Altitude sickness is the body’s reaction to less oxygen at height. It can cause headache, tiredness and breathlessness, and it affects fit people as well as the less fit. It is the main health risk in Tibet, where travellers are advised to acclimatise for 1 to 2 days in Lhasa before going higher[1]. That source is a travel agency, so treat it as planning guidance, not medical advice.
Where you meet it on a trip
You meet it on routes in Yunnan, Sichuan and Tibet. The Old Town of Lijiang sits at 2,400 m[2], Shangri-La city at roughly 3,160 m[3], and Lhasa at about 3,656 m[4]. Kunming is much lower, which is why many Yunnan routes start there.
A practical tip
Climb in steps. Order your stops from low to high, keep the first night at a new height quiet, drink water and avoid heavy meals and alcohol. Seniors, and anyone with heart or lung conditions, should see a doctor before booking. Leave a spare day in your plan so you can slow down if someone feels unwell.
Our guide on altitude sickness on Yunnan, Sichuan and Tibet routes goes deeper, and the guide to pace and stamina for seniors covers daily rhythm.
Related terms
- Old town (guzhen), Lijiang is the best-known high old town.
- Yunnan weather by month, useful when choosing the season.