Discuss Martin's answer to: What is a matter with me? I have pain in my lower back,and now the pain is spreading to area near my groin.what is it?

I would recommend getting it checked out, but it could be a tightness issue with your hip flexors.  The hip flexors are muscles that begin in the lower back, at L2-5, and attaches to your femur.  When this muscle gets tight it can cause lower back pain and pain into the groin.  This muscle gets tight if you lift a lot or sit for long periods in low chairs.  Good luck.