“Bursitis” is inflammation of the fluid-filled sacs (“bursae”) that act as cushions between bones and other soft tissues (muscles, tendons, skin). A bursa that becomes inflamed and filled with fluid can cause discomfort, swelling, and limited mobility. The skin covering the area may also be warm, reddish, and tender to the touch. In most cases, bursitis pain can be managed with applications of ice within the first 48 hours, followed by heat in the days following. When bursitis develops as a result of injury or poor posture, which often occurs when arthritis sufferers shift their body or alter their movements to avoid pain in their joints, physical therapy may help patients achieve better body alignment and restore normal body mechanics. Bursitis usually develops in joints such as shoulders, elbows, ankles, and knees.