The short answer
At the main tourist elevations — Kunming, Dali, Lijiang — the risk is low. Above 3,000 metres, especially in Shangri-La and on high hikes, mild symptoms are common. Serious illness is rare but possible; ascend gradually and descend if symptoms worsen.
Where the risk starts
Kunming (1,890 m) and Dali (1,970 m) are low risk for most people. Lijiang (2,400 m) can cause mild breathlessness. Shangri-La (3,160 m) and the plateau above it are where symptoms become more noticeable, especially on the first night.
The biggest risk factor is speed of ascent. Flying directly from a low city to Shangri-La is harder on the body than climbing gradually by road. A night in Lijiang or a slow drive helps.
Symptoms and response
Mild symptoms include headache, fatigue, poor sleep, and breathlessness on stairs. These usually improve after a day of rest and hydration. Do not drink alcohol or exercise strenuously on the first day. If symptoms persist or worsen, descend.
Serious symptoms include confusion, vomiting, breathlessness at rest, and a cough with frothy fluid. These require immediate descent and medical help. Portable oxygen is not a substitute for going down.
Who should take extra care
People with heart or lung conditions, pregnant travelers, and anyone with a history of altitude illness should consult a doctor before traveling above 3,000 metres. Children generally adapt well but need supervision and rest. Travel insurance should cover evacuation if you plan high-altitude activities.
- Low risk
- Kunming, Dali
- Moderate
- Lijiang, 2,400 m
- Higher
- Shangri-La, 3,160 m+
- Key rule
- Ascend gradually; descend if worse
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