A POPPING noise in any joint is usually the sound of the tendons snapping back into place. But..you SHOULD be concerned if you hear a sudden loud pop when a joint gets pulled or twisted in a forceful way,usually during a fall. In this case, that pop you hear may actually be a tendon snapping or the cartilage tearing. You'd also feel intense pain as well as stiffness and swelling. See your doctor immediately to get this injury treated. As with any joint that is painful, having a professional take a look can potentially save you from irreversible damage. Discover more ways to protect your joints. Watch the rest of the videos in this series