Bursitis

Bursitis is an Acute or chronic inflammation in a bursa. Bursae are thin-walled sacs lined with synovial fluid and function to lubricate and ease the movement of the tendons and muscles over bony prominences. Causes of bursitis include trauma; systemic disease (such as arthritis or rheumatoid arthritis); gout; repetitive or excessive frictional force;

or infection. Most commonly, bursitis is seen in the shoulder, although many other joints can become inflamed:

olecranon, pre- or suprapatellar, trochanteric, ischial, anserine.

Unless treated, the bursitis tends to become chronic or consistently recur. Bursitis may cause splinting muscle spasms which further compress and irritate the bursa. Advanced disease can lead to a frozen shoulder from marked collagenous adhesion formation.