What can cause lower back pain that radiates to my left side? it sometimes hurts all the way around my pelvic area. i have had kidney stones before.

Non-spine low back: Low back pain is very common, and can arise from back and other problems. Red flags for urgent evaluation include include history of trauma, fever, incontinence, unexplained weight loss, a cancer history, long-term steroid use, parenteral drug abuse, intense localized pain, and Inability to get comfortable. Apart from these, see your doctor to evaluate referred pain or recurrent kidney stone.