hi i am suffering from pain in mid left side of my back my doctor asked me for ultrasound. in ultrasound result its written that there is mild hydro nephrosis in my left kidney doctor gives me medicine but pain was still continue after that doctor have asked me to have urine culture. urine culture reports shows that there is no any bacterial diseases in my bladder or urinary tract. Now doctor have asked me that i have any spinal or rectum disease guide me that what is my matter and what i have to do.