The positioning in the pain in tennis elbow is exactly where some tendons through the forearm muscles connect on the bone around the elbow. The pain is thought to be caused by swelling or thickening in the tendon to begin with and sooner or later degeneration (wearing) on the tendon. https://treatment-for-tennis-elbo97395.liberty-blog.com/34317053/5-easy-facts-about-treatment-for-tennis-elbow-pain-described