About This Condition
Bursitis is an inflammation of one or more bursa (fluid-filled sacs that reduce friction around joints).
The most common bursa to become inflamed is in the shoulder. The cause of bursitis is mostly unknown, but trauma or arthritis may be involved.
Acute bursitis causes pain, tenderness over the inflamed bursa, and limited range of motion. Chronic bursitis attacks may follow acute bursitis, unusual exercise, or strain. Attacks may last a few days to several weeks and are characterized by pain, swelling, and tenderness.