What does a Cortisone Injection do for my shoulder?

 Cortisone is the generic name for a host of different injectable corticosteroids.  These substances have anti-inflammatory properties and can help reduce inflammation in the location of the injection.  They can be injected  into many different locations in and around the shoulder.  By helping to reduce inflammation, they also then provide pain relief.  Cortisone injections, however, do not heal anything.