Common Reasons Shoulder Pain Radiates Down the Arm

1. Nerve Involvement (Referred Pain):The neck and shoulder are filled with nerves that travel down the arm. A pinched nerve in the neck or shoulder can send pain signals all the way to your hand. This is often described as burning, tingling, or shooting pain. 2. Rotator Cuff Injuries:When muscles or tendons in your rotator cuff become inflamed (often due to shoulder impingement), it can lead to pain that radiates down your upper arm — especially when lifting, reaching, or lying on your side. 3. Trigger Points in the Upper Back:Tight muscles