#9 OF THOSE WEIRD THINGS HUMANS DO AND WHY WE DO THEM

9. PINS AND NEEDLES
Hitting your funny bone isn't very funny. Neither is crossing your legs for too long,
or waking up at night with a dead-seeming hand that gradually tingles back to life. What causes that horrible "pins and needles" sensation?

It happens when you apply too much extra weight or pressure on a nerve, temporarily inhibiting its function, and then remove the pressure. As the nerve gradually returns to normal, our brain somehow interprets its activity as a tingling sensation pins and needles.

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