6 months? You're doing something wrong.
What is the underlying cause? One side of my right post medial epicondle tendon detached in high school when I was pitching in a baseball game. After the tendon was surgically reattached, I suffered from epicondlitis for a long while. Underlying cause was scar tissue formation at the surgical point of attachment. Had to have multiple surgeries to clear that stuff out before my elbow was finally back to normal.
