Any back pain- I tweaked the lower at the lumber yard and have re-injured it, but I have a couple of ribs that slip out of place and it helps those, too. Before the roller, I could un-tweak it, but only if I could get it to relax enough- I lay on my back and push downward on my hips to provide a bit of traction and then, slowly cross my right leg with the left and vise-versa. When it goes back into alignment, I do it without a hard jerk and all I hear is a slight click, then repeat for the other side. After that, I pull my knees toward my chest, to stretch the back muscles.
I have watched chiropractors on YT and don't like the violent way they manipulate peoples' spines. They say it has to be unexpected in order to prevent the patient tensing ahead of the motion, but prefer massage. They also have a device called a Y strap and if I were to go to a Chiro and they try to use that, it's gonna be ugly. I have seen other videos of Orthopedic Surgeons watching this device being used and they were shocked that it's allowed.
I read, a long time ago, that after doing back bridges (laying on the stomach and lifting the arms and legs), the muscles are more relaxed than before- I tried it and it can help. It hurts while doing this, but it can help.
I knew a nurse who had chronic back problems and she aggravated it while a group of us were at a beach while camping- she grabbed the towel under a huge guy and jerked it, to try to get him to roll over and the jerking is what caused the problem.
Age can be 'just a number', but at some point, people stop doing strenuous activities and then, they try to lift something heavy- it rarely goes well. I'll be 67 in about two weeks and I was on my extension ladder yesterday, to clear out a downspout. I used my 'Little Giant' knockoff ladder which weighs roughly 80 pounds and had to carry it more than 50', just to move it from my garage, then had to extend it and raise the legs. I'm also 6'-2" and would never try this if I hadn't continued to lift heavy objects or if I wasn't as tall because it's awkward enough at my height- it would be much easier for it to tip over from a lower position. If I had worked at a desk for years, I wouldn't be doing this stuff but I look at it as exercise without using that kind of equipment.