I started going to the chiropractor for lower back pain and sciatica that was killing me. I knew my mattress was in bad shape. I had the box spring for way over 10 years and the top mattress for about 7. I decided to buy a new mattress set. It has made all the difference in the world. I bought a firm set to support, not only my spine, but my weight also. I am overweight. The reason I am relating this information is that possibly if you are suffering from lower back pain, it might be because of your mattress not supporting you properly. I have cancelled my chiropractic appointments because my back doesn't hurt anymore. In the long run, the mattress will pay for itself because I won't be paying the chiropractor every week for adjustments.
I agree that a bad mattress can do much more damage than we realize. My husband and I purchased a sleep number (because he sleeps at 95 and I sleep at 35) because our old mattresses were either wonderful for him and torture for me or wonderful for me but torture for him. The sleep number has been a saving grace for us!! Now we both sleep well without lower back problems (lol)
Peace and Blessings
Look For The Good and Praise It!