<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, Ive been experiencing severe pain in my lower back and side, and I often feel nauseated. I think I might have hydronephrosis.  <response>: Based on your symptoms, it is possible that you have hydronephrosis. In order to diagnose this condition, we will need to perform several medical tests. These include a radiographic imaging procedure, a urinalysis, hematologic tests such as a blood test, a complete blood count, an X-ray computed tomography Scan ct, kidney function tests, and possibly intravenous fluid replacement. 