Hello-
The tingling feeling is a result of the oxygen working throughout the tissues in your arm. Oxygen attacks all the diseased areas in your body. The same thing happened to me when I started oxygen. Now I don't get that feeling anymore, so DO NOT QUIT. Oxygen is on NO WAY harmful to the body and our body needs more of it. Our bodies produce it but some of us do not produce enough, thats when disease takes over. Again, do not stop. ALso you might want to check out the book Flood Your Body With Oxygen. IT explains most everything about Oxygen.
**ok...going out of town, so will not be able to respond again, but good luck and hope you continue to get well.