Adhesive capsulitis or more commonly "frozen shoulder", can follow rotator cuff tendinitis or bursitis of the shoulder. Traditionally, it can be diagnosed with an arthrogram with injection of dye. But new diagnostic imaging studies such as MRI of the shoulder are being used more frequently, especially to see if there is something else going on with the shoulder. You can have adhesive capsulitis in both arms, and there have been reports of this in association with hypothyroidism in the medical literature. Finally, if it does turn out to be frozen shoulder, there have been reports of improvement with steroid injections, nerve blocks, and light physical therapy. Good luck.
Sincerely,
Cyndi