I first went to the docs when I was in my teens over 40 years ago. He just remarked, "oh, so you've got one of those too have you?. It'll get worse as you get older"
He was right!
Everyone I have known who was troubled with a bad back tried everything and eventually only got it sorted with a surgeon's knife. All done privately though. I just put up with the episodes which are roughly one per year now as the prolapsed disc degenerates eventually and the vertebrae fuse togther naturally. It's taken me over 40 years whereas a surgeon would do it much more quickly, though the NHS waiting list might be quite long.
Good firm upright seating, bending knees, straight back etc, all that stuff, helps greatly. Avoid awkward twisting movements whilst bending. Don't reach and stretch, move your whole body forwards. Sometimes I think of having a beam installed in the house so I can hang upside down like a bat and take the pressure off.