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400;">Trouble sleeping Headaches This is diagnosed by doctors by taking urine and blood tests to help them understand how much your kidney is functioning. These tests will show signs of kidney problems and damaged kidneys, other tests can be done to rule out the other possibilities that may happen. Doctors test these samples to test the amount of urea and creatinine that is present in the blood. They measure the filtration of blood by the kidneys. The levels of Creatinine help to find the Glomerular filtration rate that is used to check the functioning of the kidney. This test is also used to determine the stage of the kidney disease too, and help decide the action of treatment for the patient. Past kidney issues and family related kidney issues and the medicine that is taken for the issue is all discussed to access the treatment and steps for recovering are all taken.