What causes tingling in your arms?

MANY THINGS SEE MD I have had this numbing and tingling problem on and off for years when I'm sleeping as well and have found that whenever it starts up again I take "Circulation Blend SP-11B" by Solaray, 2capsules 1 to 3 times a day depending on how severe it is for a few weeks and it goes away for several months before coming back. One can take it always of course to avoid it from coming back. All natural and just helps to circulate blood through the body. Good luck!