Bursitis is a painful condition resulting from inflammation of a bursa. Normally smooth and slippery, the bursa becomes swollen and inflamed creating a rough surface that causes much friction when moved.
Bursitis can be caused by repetitive movement, prolonged excessive pressure, or traumatic injury such as a car accident or a fall. An underlying condition such as rheumatoid arthritis can also make patients more susceptible to developing bursitis. Bursa that become infected may cause septic bursitis.