Bursitis is the swelling and irritation of a bursa. A bursa is a fluid-filled sac that acts as a cushion between muscles, tendons, and joints. The Olecranon bursa is located at the elbow. You may experience symptoms such as elbow joint pain and tenderness when you press around the joint, stiffness and aching on movement of the elbow, swelling, warmth, and/or redness over the joint. The goal of treatment is to relieve pain and reduce inflammation.