If your arm hurts, you may first think it’s injured. But pain in one part of the body can sometimes originate elsewhere. A pain in your left arm could mean you have a joint injury, pinched nerve ...

Left arm pain without chest pain can result from many issues. Some are temporary or respond to home care, while others need urgent treatment. Learn more here.

Then, reach the left arm back behind you, engaging the left tricep. Think about forming one straight, diagonal line with both arms. Return to your starting position.

Dull pain in the left arm that comes and goes can be due to a pinched nerve, injury, or CTS. It can also indicate a heart attack, which is an emergency.

Keeping upper left arm still (don’t allow it to drift forward or away from midline), bend elbow to lower weight diagonally behind head. Pause, then straighten arm to contract triceps. Repeat.

Common arm workouts with overhead movements can cause pain or injury, according to trainer Cat Kom. If you feel a sharp pain or pinch in your shoulder or back, try a more joint-friendly exercise.