Outline of shoulder showing parts of shoulder joint: acromion, coracoid process, coracoacromial ligament, subacromial space with bursa inside, clavicle (collarbone), scapula (shoulder blade), long head of biceps tendon, and supraspinatus (muscle and tendon that help form rotator cuff).
Calcific tendonitis is indicative of the accumulation of calcium in the rotator cuff (calcific deposit) causing it to cease to function normally. When large amounts of calcium accumulate, it can result in increasing pressure and irritation. It often occurs in the region of the supraspinatus muscle of the rotator cuff. Read more about Rotator Cuff Shoulder Causes; Symptoms; Diagnosis and Treatments http://www.rotatorcuffshoulder.com/Calcific-Tendonitis-rc.php
Even after initial pain is reduced trigger points in the rotator cuff muscles are still injured and require on-going treatment to increase blood flow circulation and release the hyperirritable trigger points.