Thank you so much for the information. I will try the splint.

I actually had this but I did not have repetitive motions as stated. It was suggested to try a method called dry needling. My insurance wouldn't cover that so I had physical therapy and wore an arm splint they crafted. It eventually did clear up.

From google...

An irritation of the tissue connecting the forearm muscle to the elbow.
Tennis elbow can be caused by repetitive wrist and arm motions.