It so develops due to a lack of adequate blood supply to ... Thus, your arm go numb when kept bent. Causes pins and numbness ...

Tingling is fairly common and usually relates to a problem with your nerves or blood circulation ... or on the back of your upper arm, down your forearm to your middle finger.

Pain in your left arm can be due to a number of causes, not just a heart attack. Other causes like a muscle sprain, pinched nerve ... oxygen due to a lack of blood supply, which causes pain ...