The shoulder is one of the largest, mobile and most versatile joints in the human body. Because of its high range of motion ability, it also makes it more susceptible to injury. The shoulder joint is formed where the humerus (long arm bone that extends between the elbow and the shoulder) fits into the scapula(shoulder blade). It is has the appearance of a ball and socket.
The bony framework of the shoulder joint is supported by the rotator cuff, a collection of muscles and tendons that surround the shoulder, giving it support.
Damage to this versatile and mobile joint or the surrounding infrastructure of muscles, tendons, and bones can give way to a host of problems resulting in strains from overexertion, dislocation, rotator cuff tears, bursitis, frozen shoulder, labral tears, fractures, joint instability to name a few of the more common causes of shoulder pain.