I have dealt with this for YEARS in both arms on and off. Started in one arm/elbow in my late teens after putting up a bunch of fencing and nailing LOTs of oak boards. Big nails required a big heavy hammer. When one arm is affected we will use the other arm much more to compensate. We become ambidextrous pretty quickly. Then that elbow “goes”. Not much different than a horse’s legs.
I have had a number of doctors look at it over the years. There’s really nothing that can be done other than REST, controlled use. Not much different that a horse with tendon/ligament issues. Massaging seemed to help. Yes, the doctors recommended those “elbow bands”. They don’t do much. I’ve have been told that US helps. But I didn’t find the cost merited the “relief”.
Besides Tennis, baseball players develop issues also. Esp pitchers. I read an article a few years ago that said PRP procedure is done for it. But the cost is absurd just like the majority of human medical procedures. Seem to remember the article saying something like $25,000??? Outrageous considering the procedure is done exactly the same as with a horse. I have had several PRPs done on horses. It cost around $1,000±.
Mine only went away when I left the farm side of horses and made my living on the business side of horses. IMO and experience the only way to get rid of it is rest. Like at least a year. Mine still flares up from time to time since going back to the farm side of things. I just “grin and bear it”. I use Voltaren, the human equivalent of Surpass but much cheaper. Cuts the pain/ache down considerably. And massage the heck out of the joint/tendon at night while watching TV.