The shoulder is comprised of three bones: the humerus, scapula and calvicle. The shoulder is a very mobile joint and receives minimal stability from the bony structures. The soft tissue of the shoulder, including the rotator cuff muscles and joint capsule, function to help provide stability to the most mobile shoulder joint.

Commonest reason for shoulder pain in frozen shoulder apart from this supraspinatus tendonitis is very common because of ageing process and injury calcification in tendons and elevated uric acid is another common cause radiating pain from neck slip disc and most importantly heart should be kept in mind.