What is the relationship between altitude sickness and atmospheric pressure?

Altitude sickness is closely related to atmospheric pressure. As the altitude rises, the air pressure will decrease, which will affect the oxygen content in the air. Therefore, the human body will experience hypoxia in plateau areas, leading to a series of physiological reactions, such as dizziness, headache, nausea and so on. These reactions usually begin to appear above 2000 meters above sea level, and the higher the altitude, the stronger it may be. In order to alleviate the symptoms of altitude sickness, people can take some measures, such as supplementing oxygen and using rhodiola capsules or Yanglan tablets. After a period of adaptation, the symptoms of altitude sickness usually gradually ease.