When bend over to pick up thing or put on my shoes. ?

Requires exam: sounds like lumbar strain or sprain. You must be examined and x-rays will help make the diagnosis. If you are not allergic to aspirin or NSAIS I( would suggest dual therapy with EITHER Advil ( ibuprofen) 2-3 tablets ( 400-600 mg) every 4-6 hours OR Aleve ( naproxyn sodium) 220 mg, 1-2 tablets every 8 hrs as needed. I also suggest Bio-Flex liniment 3-4 times daily . Avoid heavy lifting or bending