Altitude sickness is a situation caused by decrease oxygen levels at excessive elevations. Whenever you travel from a low altitude to a high one, it takes your physique time to adjust. Your lungs and coronary heart have to make an additional effort to compensate for much less oxygen. There are three sorts of altitude sickness: acute mountain sickness, high-altitude pulmonary edema and excessive-altitude cerebral edema. Acute mountain sickness is the most typical form of altitude sickness, and it's the least dangerous. It usually passes in a few days, supplied that you're taking it simple and not ascend any larger while you still have signs. The opposite two kinds of high-altitude sickness are way more harmful