Hello and welcome to HCM,
Pain in the region between elbow and shoulder suggests a musculoskeletal problem.
It could be muscular pain
or involvement of the joint - shoulder or elbow joint.
Pain and tenderness over the shoulder joint suggests inflammation of the shoulder joint.
A X-ray of the shoulder joint is required to look for any effusion of the shoulder joint, or bursitis
Consult your orthopedician for clinical examination, relevant of investigations and management.
Thanks and take care
Dr Shailja P Wahal