Bursitis is an inflammation of a bursa, which is a fluid-filled sac that acts as a cushion between tendons, ligaments, bones, and skin.  This sac decreases the friction between these structures and allows for ease of movement.  These sacs become inflamed when group of muscles or tendons become tight and increase the pressure over the bursa causing increased friction and pain.  Bursae (plural for bursa) are located throughout the body in and around joints or other places that are at risk for rubbing or pressure. Some common locations for bursitis are shoulders, knees, elbows, and hips and usually caused by overuse activities such as running, throwing, kneeling, or even walking. Initial treatment of bursitis involves activity modification, Rest, Ice for 15-20 minutes at a time, Compression, and Elevation.  If you are uncertain about the nature of your condition or your condition does not improve with conservative treatment please contact your primary care provider or for more specialized care contact Children’s Sports Medicine.