Continuing to higher altitudes without proper acclimatization can lead to potentially serious, even life-threatening illnesses. The major cause of altitude illnesses is going too high too fast. Given ...

It takes about two to three weeks for your body to acclimate to high altitudes ... is ascending too quickly. This does not allow the body time to acclimatize, leading to altitude sickness.

Around the world, high-altitude ... for an acclimatization hike on the days in between. The following morning, we were ready to head uphill and sleep comfortably at a higher altitude.