Shoulder tendonitis is diagnosed by a physical examination that includes tests for range of movement and strength in the arm. An MRI usually is done, since it can give the best image of the soft tissues of the injured shoulder. An arthrogram, another imaging technique, also may be done. Steroids may be used when other treatments fail. They can be taken orally or injected into the space surrounding the injured tendons.
Steroid injections can offer long-term pain relief.
However, improper steroid use is known to cause serious complications. As with many repetitive stress injuries, simply allowing the shoulder to rest will start the healing process. Ice packs can be applied to the tender area of the shoulder, which will help keep down swelling and relieve pain. Anti-inflammatory drugs will help. Exercise can be done to strengthen the shoulder, as long as there is no pain.