If you’re like most people, you probably don’t spend much time considering the incredible complexity of the human body. But it’s important to think about when it comes to pain and injury. The shoulder joint, in particular, is prone to having complex injuries. That’s because the joint is one of our most mobile – which also means there isn’t much stability present. 

That’s why instability or pain in the shoulder is extremely common. You might only feel discomfort when you move your shoulder around, or the pain may be ever-present. To understand how that occurs, it’s important to go through the anatomy of the shoulder.

Your shoulder contains three different bones: the collarbone, the shoulder blade, and the upper arm bone. The upper arm bone goes right into a rounded socked of the shoulder blade. The arm bone is kept in place by a collection of muscles and tendons, which attach the upper arm bone to the shoulder blade. 

 

Common Shoulder-Related Problems

You can experience a broad range of different shoulder injuries, such as

  • Frozen shoulder. Pain and stiffness in the shoulder are caused by inflammation, which will eventually limit movement. 
  • Osteoarthritis. With aging, the wear-and-tear process can affect the shoulder. 
  • Rheumatoid arthritis. This form of arthritis attacks the joints, which will result in pain and inflammation. 
  • Rotator cuff tears. The muscles or tendons surrounding the top of the humerus can tear, likely as a result of steady overuse or a sudden injury. 
  • Shoulder impingement. The edge of your shoulder blade, when lifted, presses on the rotator cuff. 
  • Dislocation. A bone in the shoulder can slip right out of position. If your shoulder is dislocated, raising your arm will cause you pain. 
  • Tendonitis. The shoulder’s rotator cuff contain tendons. When inflamed, it is referred to as tendonitis.