But this does not mean that the train entering Lhasa will not cause high rebellion, because it mainly depends on personal physique. Another point is not to take a shower or wash your hair, drink or do strenuous exercise for two or three days after you arrive in Lhasa. This was emphasized to me by the tour guide who took me there before. Due to the thin plateau air and low oxygen content, insufficient oxygen supply will lead to headache, dizziness and even vomiting. In severe cases, pulmonary edema will occur. Bathing, drinking water and exercising will accelerate blood circulation, leading to accelerated breathing and prone to altitude sickness. Many people, including me, don't have altitude sickness immediately after arriving at the plateau. Many of them are altitude sickness that night, and some are on the second or third day, so generally, you should be careful not to do anything that will lead to altitude sickness in the first three days.
Therefore, it is suggested that when preparing for departure, you must prepare enough materials, such as appropriate thick clothes, because the temperature difference between day and night is relatively large; There are also some anti-hyperreflexia drugs, such as American ginseng tablets, plateau vitamins, Ogilvy Blue tablets (the effect is the best I have ever used) and so on, but the drugs only play a preventive role, not a panacea. After entering Tibet, you still have to be quiet first. My past experience was summed up with blood and tears.