Why Your Elbow Hurts? Tennis Elbow Real Causes & Effective Treatments Elbow pain that worsens while lifting objects, shaking hands, or doing daily activities is often due to tennis elbow (lateral epicondylitis). In this video, Dr. Rajendra Sahoo explains the real causes of tennis elbow, why it happens even in non-sports people, and the most effective, modern treatment options available today. Tennis elbow commonly occurs due to overuse of forearm muscles, repetitive work (office work, mobile use