Kidney stones are created when certain substances in urine -- including calcium, oxalate, and sometimes uric acid -- crystallize. These minerals and salts form crystals, which can then join together and form a kidney stone.
Kidney stones usually form within the kidney, where urine collects before flowing into the ureter, the tube that leads to the bladder. Small kidney stones are able to pass out of the body in the urine -- and may go completely unnoticed by you. But larger stones can irritate...
Abdominal aortic aneurysm (AAA), which is potentially life-threatening. Pain from a
kidney stone is usually on the right or left side depending on which kidney is
affected. Pain from an aneurysm is located in the center of the abdomen