Patients with early kidney injury do not have any clinical symptoms, a few patients can have eyelid edema, and most patients can find the presence of proteinuria or hematuria in urine through urine tests and other routine examinations. Inspection indicators are as follows: 1, urine examination: kidney function is mainly to filter urine, after kidney injury, it will lead to glomerular membrane permeability changes, which can be observed through urine examination; 2, ultrasound examination: ultrasound early without any symptoms, after the middle and late stage of kidney injury may have kidney atrophy; 3, kidney function examination: need to clarify the value of urea and creatinine. The above three examinations need to be combined and observed, and none of the single examinations can assess the kidney problems.