I have foot, lower back pain, sometimes mild painto my scrotum. Xray result shows normal spine. Urinalysis normal except for many calcium oxalate.?

Most likley back. Problem, check it out have doctor order MRI on your back.Good luck.
Maybe a kidney stone. Kidney stones can cause pain in the lower back or flank (area between rib and hip). The pain can wrap around to your lower abdomen and into your scrotum. The most common stones are made of calcium oxalate. X-ray won't show a stone, but ct scan can. Not sure foot pain is related. Drink lots of water and see your doc of the pain continues.