Hi Kimmy and welcome -
I agree with the others that you should have this checked out. Very often a pinched nerve in the neck can radiate down your arms.
I do know exactly what you are talking about however, as I have this feeling/sensation with my legs. I always say it feels like there are elastics at the top of my legs and that it doesnt feel like the blood is getting all the way there. My legs swell when I feel like this though, and, actually can be sore to touch. I have told my docs about this (including ER) and they checked my heart to see if there were a circulation problem and it was fine. I STILL have it almost everyday, particularly if Ive done alot the day before, and I KNOW its not normal.
You should see a doctor (usually a neurologist deals with numbness) to determine whats causing this.
For God has not given us a spirit of fear; but of power, love and a sound mind. 2 Timothy 1:7