The issue with kidney failure is that symptoms develop very slowly, and some people don't even have visible symptoms before the situation becomes critical. Symptoms of kidney disease are blood in your urine, reduced amount of urine, swelling of legs, ankles and feet, or persistent nausea. However, you can still experience fatigue, high blood pressure, or a loss of appetite without the symptoms above. These are all signs of kidney failure. In order to make sure you're healthy, you can ask your doctor to conduct kidney disease diagnosis tests - these generally include blood tests and urine tests. If nothing comes up on the tests, it might be early, so if you're still suspicious, be prepared to watch for symptoms and report them to a doctor.