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Yes it is safe to numb the arm before injection. It is usually done with children when an anaesthetic cream is applied over the skin before injections. For adults it is not always necessary unless the calibre of the needle is big .
You may have touched a nerve. Or perhaps you somehow cut of blood supply to the limb.
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.
Ask the Doc they will
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 !
I am suffering from the same problem but also I feel pain in my bones...it is like my left arm is asleep all the time. I went to the doctor and got an MRI yesterday...it looks like one of my vertebras in my neck is pinching some nerves and the doctor will now give me an injection (epidural). I hope it works.
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.
thigh or arm
yes
Because u sleep on it, Einstein.