Bursitis: The Causes, Symptoms and Prevention By SportsMed Physical Therapy Bursa are fluid filled sacs located throughout the body near main joints. They help with proper gliding of joints and reduce friction during movement. When bursa become inflamed, bursitis occurs. Causes of Bursitis There are several causes but the most common include trauma, infections, or preexisting conditions, such as gout, which cause crystals to form… Read More...