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.
Cause of Pins and Needles. The feeling of pins and needles is known as paresthesia.. Most people associate it with sleeping incorrectly on a nerve. This causes the nerve to stop sending signals so that it falls asleep and creates a feeling of numbness. When pressure is taken off of the nerve, the body sends shock waves down the nerve to wake it up. This is what creates a feeling of pins and needles.