Shoulder and Elbow Surgery is related to the shoulder, elbow, and upper extremities. Shoulder and elbow surgery is a condition in which the outer part of the elbow becomes sore and tender. Tennis elbow is an acute or chronic inflammation of the tendons that join the forearm muscles on the outside of the elbow. The forearm muscles and tendons become damaged from overuse — repeating the same strenous motions again and again. This leads to inflammation, pain and tenderness on the outside of the elbow.