Many people experience pain, stiffness and swelling in peripheral joints such as knees, elbows, and shoulders. This may be due to wear and tear, prior injury, or osteoarthritis. Peripheral joint injections are used to administer anti-inflammatory medications or artificial joint lubricants to the painful joint. These medications decrease inflammation and pain and improve movement comfort. Pain relief from peripheral joint injections allows patients to engage in a rehabilitation program and resume regular activities.