Linda, I had been having steroid injections in my right hand to help with my combined tensonivitis, carpal tunnel and rheumatoid arthritis for a considerable time. Initially the injections did give some relief for a few months, but as my osteoporosis was becoming worse they were stopped. So you have to consider the possible side effects of the injections into the bargain.
I then had the carpal tunnel op and initially had relief for the first time in years. The op was worth having to be pain free and at last get a decent night's sleep. I couldn't have a general anaesthetic or sedation, but had a local instead, it actually wasn't too bad at all.
I remember it well, because the consultant said to me, "This is the day the world will change for ever." It was the day Trump became president.
However, the pain has become excruciating again, the reason given was perhaps they had left it too long to operate, preferring to first try splints and down the steroid injections route.
It now looks like I have ulnar tunnel syndrome on my left hand into the bargain.
My advice would be don't delay making a decision one way or another. The longer you leave it, the less successful the outcome.
Most people I know have had a good deal of success with the op, without any future problems, but with every procedure there is of course always a chance it won't help.
I was in so much pain and unable to use my hands much, that I decided the op couldn't be any worse than my current situation.
Good luck with whatever you choose.