Seek immediate care if any injury to your elbow causes signs or symptoms of a UCL injury. This is especially true if you feel a “pop” in the inside part of the elbow while throwing. It’s important to get a prompt and accurate diagnosis to determine the severity of the injury and get proper treatment. If you are unable to throw or have pain that is negatively affecting your throwing, you should be evaluated. This is particularly true if the pain doesn’t completely resolve after a few days of rest.