Apr 16, 2009, 6:39 PM. i was at beijing, xian and shanghai end november/early december last year. it was chilly in beijing and xian. about 7-10 degrees in the day and close to freezing point at night, but still manageable. further south in shanghai, it was rather warm, actually.
Possible Causes of Numbness While Sleeping. Numbness while sleeping can be among the causes of insomnia when the loss of sensation interferes with the ability to stay asleep through the night. Pinpointing the cause of the problem can lead to a viable solution.
Pressure Upon the Arm. Raising the Arms Above the Level of the Heart. Keeping the hand(s) above the level of the heart during work or sleep can prevent appropriate blood perfusion of the hands, and cause numbness, tingling or partial paralysis of the hand(s) within few minutes.