One way to get rid of it is to pinpoint what caused it in the first place and then avoid that activity. At least for awhile, anyway. For me, T-bar rows usually kicks in a spate of tennis elbow. I dig the shit out of that movement, but I've shyed away from it completely in the last few years. No more t-bar rows for me, though bent-over rows with either a dumbbell or barbell suit me just fine. Go figure.