Bursitis means “inflammation of the bursa” happens when a small fluid-filled sac (the bursa) that is placed in areas of high friction becomes overused and irritated. Bursitis happens commonly after age 40. Bursitis is a commonly diagnosed injury that occurs around many joints of the body, more common in the shoulder, hip, elbow, and knee. When trauma is the cause of bursitis, a direct blow or fall onto the knee, elbow, hip, or heel may result in damages to the bursa.
Bursitis also can happen during daily activities like using tools more frequently, doing gardening, cooking, and typing for a long time. If someone has bursitis, the affected joint might feel stiff and painful when you press on it or when you try to move.