What might cause left arm pain that extends from the shoulder to the hand?

One common cause of pain running from the shoulder down to the hand is called cervical radiculopathy. This happens when a nerve in the neck gets squeezed or pinched, which can send pain all along that nerve's path into the arm. When you move your shoulder or lift your arm in certain ways, the pain might change, which can sometimes help doctors know the pain is coming from the neck.

Another, much less common cause is a glomus tumor. This is a tiny growth that can cause long-lasting pain even though it is rare. Other reasons might include issues with the muscles or joints near your shoulder that affect nearby nerves which may be damaged from physical injury or overuse.

Often, the problem could be related to how the neck and shoulder work together. If you keep feeling this kind of pain, you can start by using a free symptom checker to better understand what might be causing your discomfort, then visit a healthcare provider so they can find out the exact cause and recommend the best way to help you feel better.