There is a strap that is velcro and ace bandage I believe futro makes it. I have seen them at Target and Walmart they seem to help. The cost is around 13.00 My pain management doctor told me about it. Give it a shot.
I have had this issue i.e.tendonitis elbow with my bilateral carpal tunnel issues. Series of arm stretches prescribed by PT really helped. Look up carpal tunnel physical therapy arm stretches on internet. Ice is my go to as well.