I just received a phone call that my urine test came back that I have low kidney function... the doctor asked me to push fluids and come back in one week to do another test.... I am wondering what causes low kidney function?? Is this something I should even be concerned with?? I also had a blood test to check my electrolytes and those were just fine... I am wondering if it was dehydration wouldn't those have an issue?? In my opinion, I stay very hydrated, so don't feel that it is dehydration. I have been getting these horrible pains in my back here and there where my kidneys are located. Just wondering if anyone can answer whether I should even care I got the call??