After a few days or months (depending on the number of times one has been on high altitudes), the unpleasant symptoms disappear as the body adjusts to the lower oxygen levels through the process of acclimatization (Boga, 1997). Initially (in the first few days), the body adjusts by increasing the heart rate in a bid to elevate the amount of oxygenated blood being supplied to the cells (Ward, Ward & Leach, 2011)