What is the best way to treat tendonitis?

I have tendonitis in my elbow. The pain extends to my upper arm. I do circuit training 3 times per week. I saw a doctor who advised me to stop all upper body equipment until the tendonitis was gone then add one machine back each week. The problem is my tendonitis has never completely healed. It hurts whether or not I have exercised. I take Advil but it gives me very little relief.

If I do my upper body exercises when the pain isn’t especially severe am I doing further damage to my arm?

How to relieve pain from tendonitis in the elbows?

My hubby has really bad pain from tendonitis in his elbow. He takes Advil and puts a arm brace on it. But he is in so much pain and can’t get it relieve at all. Anyone have any suggestions or tips on what to do? Do you know if he is supposed to use hot / or cold?
I know you are supposed to rest it and let it heal, but with his work, he cannot take that time off. He has to work, and he uses it a lot at work. HELP!!! How long til it’ll go away?