I have been experiencing pain in my kidneys. Mostly left kidney and rarerly right kidney. Got an ultrasound report which states-"mild dilatation of left pelvicalyceal system and upper ureter is present; probably due to mid/lower ureteric calculus. A small calculus measuring 2.9mm is present in left inferior calyx. Both kidneys are normal in size ( rt: 8.6cms, lt: 9.6cms ), shape , position and echtexture. Renal outline is smooth with normal parenchymal thickness seen in both kidneys . No perinephric collection is seen . The urinary bladder and prostate are normal." I have earlier experienced same pain but it used to subside in a day or two. This time it was unbearable.