In between the joint bones, muscles, tissue and skin are small, fluid-filled sacs called “bursa” that protect the joint against friction and irritation. Bursitis occurs when these sacs become swollen, irritated and inflamed due to overuse or injury. Bursitis usually affects the elbow, knee, shoulder, hip and Achilles tendon, and often causes pain and joint stiffness. Conservative treatments may include ice therapy three or four times a day, rest, anti-inflammatory medication and corticosteroid injections. Most cases of bursitis are successfully treated using conservative care – but in the rare case that these treatments don’t work, surgery may be required.