It helps muscles, tendons, etc. to slide over each other. There are many bursas in the body - particularly in the areas of the shoulders, the elbows, the hips, the knees and the Achilles tendon areas. The illustration below shows a bursa in the shoulder, called the subacromial bursa. The biceps tendon and anatomy of the shoulder are also seen. Tendinitis is an inflammation of a tendon.
Tendons attach the muscles to the bones.
There are many tendons in the body - in the shoulders, hands, knees, feet and ankles, as examples. A. Either of these conditions cause pain on motion of the inflamed area. The pain can also be present at rest. Calcium deposits are not infrequently seen on X-ray in areas of chronic bursitis or tendinitis. There are a variety of therapies.