|When you are in a high altitude destination, do you:
Feel nauseous and weak?
Struggle to fall asleep?
Feel irritable and cranky?
These are the classic symptoms that can develop when traveling to a high-altitude destination, or when heading off into the mountains for mountain climbing, skiing, or hiking. This condition is called altitude sickness or acute mountain sickness.
The further into the atmosphere we climb, the thinner the air around us becomes, with less and less oxygen. Although the air remains constant, the barometric pressure decreases, resulting in fewer oxygen molecules being inhaled-- and it is this lack of oxygen that causes altitude sickness.