I had the surgery done about 12 years ago & don't regret it at all I also had tendonitis in the other arm * had that operated on about 8 years ago. The ulna nerve entrapment came about from my occupation at the time. I literally wore out the cartilage in my left arm. I will soon be a liscensed massage therapist in Ohio & will agree that massage therapy cane sometimes help. But would not have helped me. If surgery needs to be done it should be done wothout delay. I am not trying to frighten you but.. Every time you use that arm you are abraising that nerve & could lose the use of it.
one thing you can try is using a castor oil wrap on it at night when you sleep. Castor oil has a lot of healing qualites. But you do want COLD PRESSED CASTOR OIL. If you have any more questions that I can help you with feel free to PM me
Charcloth