Here we are talking about non-specific or mechanical low back pain which is by far the most common cause of pain in the low back.
This is generally where the pain is confined to the low back it doesn’t spread below the buttocks, there are often quite clear patterns to the pain or aggravating and relieving factors and may not even bother you all the time.
Many things can cause non-specific low- back pain; there are many tissues in the torso which can become injured, irritated or inflamed. Even having an x-ray or an MRI scan will not necessarily give you the complete answer.
This is often the grey area where osteopaths work. With a combination of manual therapy and implementation of exercises at the right time you can gain a lot of improvement with ongoing low-back pain.