Diabetes is the most common cause of kidney failure. I can confirm that statement, because one of my close friend's father is currently suffering from diabetes. He is now regularly taking dialysis which is a blood cleansing process every week. His kidneys were effected because of the diabetes. He has had diabetes for more than a year, in which his kidneys were fine. But recently he started having symptoms due to kidney failure. These are the symptoms of advanced kidney failure: swollen legs,swollen face,fatigue,headache,mausea,and vomiting. Be aware if you are having these symptoms.