Elbow pain is a common complaint that can result from various causes, including injury, overuse, or underlying medical conditions. The elbow joint is a complex structure that allows for bending and straightening of the arm, as well as rotation of the forearm. Pain in the elbow can occur on the inside , outside , or back of the joint, and it may vary in intensity from mild discomfort to severe pain. Tennis elbow is a repetitive strain injury caused by overuse of the forearm muscles, resulting in inflammation and pain on the outside of the elbow.