The site of your pain in tennis elbow is in which some tendons from the forearm muscles connect towards the bone around the elbow. The pain is thought to be due to swelling or thickening from the tendon originally and eventually degeneration (carrying) of the tendon. The supinator muscle is https://www.theorthopaedicandpainpractice.com/how-to-alleviate-tennis-elbow-pain-tips-from-a-medical-expert/