Kidney examination includes urine examination, blood examination, imaging examination and kidney biopsy. 1. Urine examination: urine examination includes routine urine examination, which can detect urine red blood cells, urine protein, urine sugar, urine ketone body and other indicators; quantitative urine protein examination, which can check the total protein of 24-hour urine; urine red blood cell analysis, which can detect whether the urine red blood cells are originated from the glomerulus or other parts of the kidneys. 2. Blood test: blood test includes renal function test, indicators include glomerular filtration rate, blood creatinine, blood urea nitrogen, etc., which can assist in the diagnosis of acute and chronic renal failure, nephritis and so on. 3. Imaging examination: such as renal ultrasound, CT and magnetic resonance, etc., which can diagnose renal blood vessels, stones, cysts, tumors and other diseases. 4. Kidney biopsy: it is the gold standard for the diagnosis of various renal diseases, which can distinguish the pathologic typing of nephrotic syndrome, diabetic nephropathy, and SLE nephropathy, and is of great clinical significance for the treatment in the future. When any abnormality is found in the kidney examination, please consult the hospital in time and take active treatment under the doctor’s guidance, so as to avoid delaying the condition.