Hey mate golfers elbow is caused buy overuse, exactly the same as tennis elbow but on the inside not outside of the elbow joint. The tendons attachment to the medial epicondyle becomes inflamed and causes your pain. The wrist flexors are attached to this area so avoid heavily gripping until the pain subsides (may take up to 6 weeks). Best treatment is rest, regular icing and NSAIDS (anti inflammatory drugs). Eccentric exercises focusing on the wrist flexors have been shown to re strengthen the tendon, slow and boring but necessary if you want to avoid surgery down the track