Low back pain can be caused by a myriad of factors and not all treatment is the same for all low back pain.
80% of low back pain resolves without any interaction. The other 20% needs assessment and management by physiotherapy advice and ergonomics (i.e. having your work/home area to suit you).
A detailed examination is needed and then the appropriate treatment is recommended. Pain relief is good for early management but not as a solution for long-term use. The spine is a mechanical object and good posture, weight control and exercise is the gold standard for long-term recovery.