I had golfer's elbow. I modified my activities. I brought my handlebars up on my 2 bicycles--I got rid of the drop bars on my Surly Long Haul Trucker. I rubbed my arm, stretched it, iced it. I took it very easy. Not lifting heavy things. It hurt like the devil even trying to dress myself. Finally after 8 months it started getting noticeably better. After about a year it disappeared.
The doctor said the tendon had degenerated which is common. Now, almost everyday I stretch my wrists and forearms to keep the muscles and tendons supple, and use a squeeze tool to strenghten hands.