Always been given help when I've asked for it on here so I thought I'd give something back. Anyway lower back pain has been plaguing me for a week or 2 now and after speaking to a personal trainer at my local gym and him telling me lower back pain can be caused by tight hamstrings, I've been doing stretches for the last few days that loosen them up and improve flexibility along with some core exercises such as plank and bridge etc and the pain has gone after just 2 days. Apparently having tight hammies can mean that they pull the pelvis out of alignment which in turn pulls down on the lower back eventually weakening it because it has to work harder. Anyway I can already feel a difference after a few days stretching and occasionally applying a bit of deep heat to it. This worked for me so if you've been suffering from lower back pain whether it’s mild or severe then maybe give this a go as tight hamstrings may be the problem.