Shoulder bursitis is characterized by inflammation between the top of the arm bone and the tip of the shoulder.Between these bones are the shoulder rotator tendons and a fluid filled sac (the bursa) that protects the tendons. Inadequate space in this joint can make it difficult for the tendons to slide effortlessly within it and inflammation to both the tendons and the bursa may result. The inflammation causes the bursa and the tendons to swell, which further reduces the space and aggravates the inflammation, creating a vicious circle. As the space becomes progressively smaller, shoulder movement may be restricted – a condition known as impingement. A shoulder support can support pain relief and healing by restricting the movement of tendons and bursa and giving them a chance to recover.