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Shoulder Bursitis

Bursae are flattish, fluid-filled sacs lined with synovial membrane that typically lie between bone and tendons or adjacent tendons; bursa sacs provide a smooth gliding surface for tendons to move along and may lessen the irritating friction that could otherwise occur between the tendon and other structures. At baseline, the fluid in the bursa is minimal. When the bursa becomes inflamed (as indicated by the suffix “itis”), it enlarges and the fluid contents increase. There are eight bursae in the shoulder. The primary or ...

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