Patients presenting in primary care often have a combination of different shoulder problems.
Intrinsic shoulder pain:
Rotator cuff disorders: rotator cuff tendinopathy, impingement (trapping of the rotator cuff tendon, particularly the supraspinatus, in the subacromial space), subacromial bursitis, rotator cuff tears, calcific tendonitis.
Glenohumeral disorders: adhesive capsulitis ('frozen shoulder'), arthritis.
Acromioclavicular disorders.
Biceps tendonitis.
Infection (rare).
Shoulder instability - associated with hypermobility including subluxation or dislocation (see also separate article Shoulder Dislocation).