High Altitude Sickness
I went to Lhasa by train on 19th last month. I was quite worried about high altitude sickness,because spring has less oxygen than summer. It took 3 days from Shanghai to Lhasa. The third day landscape was great: Morning sunshine on the grassland to make it look like a big gold blanket. Small rivers or streams were still frozen. Snow mountains are about 5200m, but looked as small hills. A lot of animals out of window, yaks, wild donkeys,sheep,birds,etc. Baby lambs loved to stand close to the train just like what little kids did. When I saw the half-iced lake,I was excited to the max!Later I felt headache,felt like vomiting as car sickness and sweated a little bit. My heart beat in a strange way which was hard to describe.I looked into a mirror and I saw my lips turned purple.
I took 3 days to get used to the Lhasa altitude. It was painful during that time but it is an unusual experience now think of it.