Been diagnosed with frozen shoulder but arm turns red when raised at shoulder height and bent towards head, what causes this. i had surgery on 7-14-11 for impingement, bone spurs and part of bursae sack removed also have a small tear that was not repaired

Your : Your description of color changes with position of the shoulder and head is consistent with thoracic outlet syndrome. This occurs when nerves or blood vessels get pinched where they exit the neck into the armpit. This is usually a separate phenomenon from the frozen shoulder. Have your orthopaedic surgeon evaluate the neck and shoulder area for thoracic outlet syndrome. There are physical exam findings that are helpful and sometimes imaging studies are needed. Most patient respond well to therapy. Rarely, some require surgery.

Hard to tell: Agree with dr. Wood in part regarding color change. Probably worth examining. Would want more details on the "small tear" that wasn't repaired. If full thickness i would advise repair especially with continued pain. Stiffness may be just inhibition from the pain. Seek out a shoulder specialist this go round. There is a difference in skill set amongst surgeons so be careful next go round.