Shoulder pain that radiates down your arm can be caused by rotator cuff injuries or pinched nerves or even frozen shoulders or bursitis.
Rotator Cuff Tears or Tendinitis can cause shoulder pain that radiates down your arm..
Your rotator cuff, a group of muscles and tendons which stabilize your shoulder can become injured and cause pain which radiates down your arm.
Other conditions that can cause shoulder pain that radiate down your arm include.
Calcific Tendinitis which is inflammation and calcium deposits in your rotator cuff tendons that lead to pain which can radiate down your arm.
Shoulder Impingement is when tendons and bursa are pinched or compressed and can cause pain which radiates down your arm.
Nerve problems such as a pinched nerve in the neck can lead to pain which radiates or travels down your arm and can even reach the hand.
Thoracic Outlet Syndrome is when compression of your nerves and blood vessels in the space between your collarbone and your first rib can lead to pain, numbness and tingling in your shoulder and arm.
Brachial Plexus injury can cause shoulder pain which radiates down the arm and is an injury to your brachial plexus which is a network of nerves which control your shoulder, arm and hand and can cause numbness weakness and pain.
A frozen shoulder can also cause shoulder pain that radiates down your arm and is a condition that causes pain and stiffness in the shoulder joint and can sometimes radiate down your arm.
Bursitis can also cause shoulder pain which radiates down your arm and is inflammation of the fluid filled sacs or bursae around your shoulder joint and can cause the pain that radiates down the arm.
Osteoarthritis can also cause shoulder pain that radiates down the arm and is wear and tear of the shoulder joint.
Parsonage Turner Syndrome can cause shoulder pain that radiates down the arm and is a rare conditions that causes shoulder pain which radiates down your arm and up your neck and scapula.