A series of medical tests to see if this is true. These include blood tests, such as the number of whole blood cells, blood sugar measurements to check blood sugar levels, urine tests to check kidney function, electrolyte panels to check your body's salts and minerals, lipocardial panels to evaluate cholesterol levels, and hemoglobin A1c measures to assess overall blood sugar control.
There's a couple of symptoms that seem to have something to do with the kidney, the doctor, that are always tired, your appetite is falling, your feet and ankles are swelling.