Multiple problems can affect the shoulder. These problems can be causes by sudden injuries, degenerative changes over time, or overuse from work or sports.
Sudden injuries can include the following:
- Fractures of the clavicle (collar bone), scapula (shoulder blade), or humerus (arm bone)
- Tears of the muscles in the shoulder such as the rotator cuff, which helps, bring the arm into an overhead position.
- Shoulder dislocations which often result in labral (type of cartilage in the shoulder) tears and also injuries to the bone of the glenoid (socket) or the humerus (ball of the socket)
Degenerative changes to the shoulder can cause pain that gradually occurs and can worsen over time. These can include:
- Rotator cuff tears
Overuse injuries include those due to an activity that is performed over and over again leading to wear of a part of the shoulder.
- Shoulder impingement
- Superior labral tears anterior posterior (SLAP)
- Rotator cuff tendinitis
- Biceps tendinitis and tears