What causes our feet to fall asleep (pins and needles sensation)?
#25092. Asked by Tommy. (Dec 11 02 9:38 PM)
'Pins and needles' (paraesthesia) is a sensation of uncomfortable tingling or prickling, usually felt in the hands or feet. The affected area is sometimes said to have 'fallen asleep'. A common cause is leaning or lying awkwardly on a limb, which either presses against the nerves or reduces the blood supply to the local area. Changing position quickly restores normal feeling. Any numbness is soon replaced by the tingling and prickling sensation, as the nerves start sending messages again to the brain and spinal cord. In some cases, pins and needles are caused by nerve damage or certain disorders of the central nervous system.
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