Not only is the cortisone damaging, the passage of time lets the torn tendons and muscles atrophy, leaving very poor tissue for the surgeon to work with.

A quick internet search will show you that prompt attention to the problem results in the best recovery. I was injured in a fall on December 7, 2007 and had my surgery on December 31, 2007. During the three weeks that intervened my pain subsided to a great degree. Mentally, it would have been easy to put off the surgery. However, I'm firmly convinced that prompt action pays in this situation. So I got my surgery as soon as it could be scheduled. I had a completely detatched subscapularis (an uncommon injury), with the biceps tendon partially torn and dislocated. Dislocation of the biceps tendon caused other collateral damage. Mine couldn't be done with an arthroscope, and I knew that up front.

My therapist says I should attain a full recovery.

Curl