Fluid-filled sacs in the shoulder joints act as cushions between bones and soft tissue. If they become inflamed or swell due to overuse or repetitive actions, you can develop bursitis. Severe cases of this common shoulder disorder are not only painful but make the simple tasks of daily living difficult.
Tendons are thick flexible cords that attach muscles to bones and are vital for shoulder mobility. In older people they may split, or become inflamed through wear and tear, or due to a repetitive strain injury. In this case the best remedy is resting the arm and the shoulder. Specialists often recommend physical therapy or ice packs, depending on their diagnosis.