Blood circulation is enhanced, brain blood flow increases, and urine acidity rises. With the increase in altitude within a certain range during mountain climbing, the content of hydrogen ions and negative oxygen ions in the atmosphere, which are called "air vitamins", increases more and more. Together with the decrease in atmospheric pressure, it can promote a series of changes in human physiological functions, can play an auxiliary treatment role for diseases such as asthma, can lower blood sugar, and increase the hemoglobin and red blood cell count in anemic patients.