Pain in your left arm can have many different ... you may also notice weakness, swelling, coldness, numbness, tingling, and ...

swelling, and sometimes the build-up of scar tissue in the muscle. A brachial plexus injury affects the nerves in the shoulder. These nerves carry movement and sensory signals to the arm and hand.

the left arm. Angina feels like a "squeezing, pressure, or dull aching pain in the center of the chest. It can radiate to the arm, but it typically doesn't pass from the wrist into the hand," says ...