As long as I do yoga three times a week, I’m able to escape the lower back pain that bothered me for many years.
I visited a physiotherapist a couple of times. Not the type that gives massages, but one that gives you physical excercises that you can use to help yourself. The therapist told me why I was in pain. I could never have guessed why myself, - not flexible enough on the front of my thighs, not strong enough on the sides of my abdomen. (I don’t know the English names of muscles), - and that I should tilt my pelvis forward to avoid squeezing the lower back nerves. All my back problems were caused by the front of my body.
(this is my case, not a general problem. I just mentioned it as an example of how difficult it can be to understand why a specific part of the body hurts. Often the problem is located in other parts of the body)
Once I knew, I could use my yoga practice to remedy the issues. It took time before it got better, but it did, and that has made my life a lot better. But still I need to maintain the practice, - three days without yoga, and the pain returns. Always.
The nature of your pain is something you need a professional to assess, but I wish you luck. And hopefully you will find a solution.