How do i know if i have back pain, or kidney pain?

Good question: Often difficult to tell. Easy with symptoms of kidney infection, ie fever, burning on urination or blood in urine. Kidney pain usually on or more on 1 side than both ; deep to lower ribs in back which is higher than commonest back pain which is lower. Tapping lower ribs on affected side kidney >back pain. Tender vertebrae in midline, increase in pain twisting spine or bending backwards favor back.