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Could be a few things. The most common reason for a limb falling asleep is that you positioned the limb funny and compressed a nerve in that limb against something, causing the limb to "fall asleep." If that was not the source sometimes injuries to nerves will cause the same effect.
your arm went to sleep or it is numb
If you swung your arm yesterday and it has been numb for two days, you should see a doctor. You may have a pinched nerve.
If you burnt yourself on your wristand your arm is numb you should probably go see a medical specialist.
Cutting off bloodflow or pressure on the nerve in your arm can cause it to "fall asleep" or go numb, as you've described.
Ask the Doc they will
You may have touched a nerve. Or perhaps you somehow cut of blood supply to the limb.
You may be pinching a nerve. Please consult a doctor.
If your arm is tingling and feeling numb it may be asleep just shake it until it feels better ! WARNING : This is only a suggestion this may not be the case !
Maybe you've been sleeping in the wrong position. Sleeping with you head on your arm, for example, can cut off the circulation through your arm, so therefor it goes numb. I'm not too familiar with the numb legs though, sorry. It may be an anxiety attack
The blood carries oxygen and nutriens throughout your body. In your case you had to hold your arm in wierd position and the blood couldn't flow into your arm what made your arm turn red/purple and go numb.
yes