The kidney function test is a routine test that is included in all medical examinations. By drawing blood to test the creatinine and urea values, we can understand whether there is kidney function damage. If there is an increase in creatinine, there may be kidney function impairment. In addition to kidney function, urine routine and kidney ultrasound are also needed for kidney disease detection. Because in the early stage of many kidney diseases, patients mainly show abnormal urine test without kidney function impairment. When there is positive urine protein and urine occult blood, it indicates kidney-related diseases, common causes include nephritis, nephrotic syndrome, diabetic nephropathy, etc. Patients need to be given active drug intervention and life diet to avoid the deterioration of kidney disease.