Does anyone have any knowledge of the affects of steroids on tendonitis? I have been plagued by chronic tendonitis of the shoulder (rotator cuff) for several years. As of lately, it was feeling pretty good and I was about to begin my first cycle. Unfortunately, while doing bench press a couple of days ago, I got a severe pain in my shoulder.It is worse than ever and does not seem to be going away anytime soon. I have an appointment to see a Dr. just to make sure that it is not something else but I need to know if there is a cycle that will help to eliminate tendonitis.