Just as in angina, heart attacks can cause sudden left arm pain. A 2013 study found that 17% of the surveyed people who had heart attacks also had radiating pain down the shoulder, upper arm ...

Struggling with shoulder pain and stiffness that makes everyday ... While seated at a table, place the hand of your affected arm on the table palm down. Bend at the waist so you're leaning over ...

A pinched nerve in the neck, or cervical radiculopathy, can cause radiating pain to the shoulder, and muscle numbness or weakness that can spread down the arm to the hand. This may resolve on its own.

People who spend hours in front of a computer or behind the wheel are especially at risk. The pain usually starts in the upper back and can spread to the shoulder or down the arm.