The strange sensation of getting out of bed and feeling an uncomfortable tingling in the foot or leg has happened to all of us; or waking up at midnight because you can't move your arm. To this we usually say that our extremities have fallen asleep, and we do not give it much importance.
In general, this tingling sensation occurs after having pressed that part of the body for a long time, cutting off communication with your brain.
The pressure puts your extremities to sleep
Applying pressure makes nerve pathways are compressed and the nerves cannot correctly send the electrochemical impulses. These impulses carry sensory information from nerve endings in the body to the brain, as well as instructions from the brain to the extremities.
When something interferes with this transfer, we don't have all the sensation in that part of the body and the brain has trouble communicating with that extremity. the pressure too can compress arteries, which prevent nutrients from reaching the cells; so those nerve cells will behave abnormally and will also cause interference in communication.
That is why the information transmitted from the limb becomes confused and the brain receives different messages. There are nerve cells that do not transmit information and others that send wrong impulses.
Should we worry?
Tingle It's a signal for you to adjust your position. and allow the brain to receive the correct signals from your limb. If your arm goes numb for 10 minutes, there is no health threat; but cut off circulation for much longer could cause you to suffer some serious nerve damage.
Normally, once you move your leg, arm or foot, the nerve impulses start to transmit correctly again, but it is normal that you do not regain full sensation. This is because your body needs a readjustment time so that the nerves begin to transmit impulses correctly.
This causes the tingling sensation to increase, coming to feel as if they were sticking needles. Within a few minutes, the nerve fibers return to normal and you will once again have full control of your extremities.
Don't be afraid, it's just a warning sign for you to change your position.