Altitude sickness: minimising the risk

One problem associated with high altitudes is acute mountain sickness (AMS), which may range in presentation from mild to severe symptoms and is responsible for a number of deaths each year. The symptoms, and severe forms especially, are completely preventable.

The risk of AMS increases with both high altitude and rapid ascent to high altitude. AMS is more likely to occur in travellers who ascend rapidly to heights of 2400 m, and especially above 3400 m.