hi there, the various causes of right
shoulder pain are bursitis, biceps tendon rupture, labrum tear, rotator cuff
tendonitis, muscle spasm, pinched nerve and shoulder dislocation. Other possibilities are gall bladder disease, or gallstones, liver abscesses, disorders of esophagus; penetrating ulcer in stomach, pancreas, and frozen shoulder is a common cause for stiffness and pain in shoulder. This could also be a sign of osteoarthritis and rheumatoid arthritis.