I think pretty much everyone has experienced the pins and needles feeling, but what is actually happening to cause this feeling? And what determines how long it will take for the “effects” to subside?
In: Biology
What is happening when a body part falls asleep is for a period of time it has been robbed of oxygen in the form of blood. So the blood has been restricted, and the nerves are robbed of oxygen as a result.
The nerves don’t hurt while we’re sitting on the body part because there’s no oxygen/blood being sent to the nerves. Then when we stand up or move around, the oxygen/blood starts to go back to the nerves and “wakes” the nerves up. The feeling we perceive is the nerves waking back up because they have oxygen again.
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