Kidney function test needs to improve the laboratory examination, self-test is one-sided, patients can observe whether they have digestive symptoms and edema and other early symptoms of renal hypokinesis. 1. Digestive system symptoms: If renal failure occurs, patients often have digestive system symptoms in the early stage, such as nausea, vomiting, abdominal distension and poor appetite, even more obvious in the morning, brushing teeth and eating breakfast. 2. Edema symptoms: poor kidney function will cause drainage function to be weakened, which in turn will cause facial and eyelid edema symptoms, and may even cause lower limb edema symptoms. These clinical symptoms can only be used as a kind of judgment of renal function, but not for confirming the diagnosis. To confirm the diagnosis, it is necessary to go to the regular hospital to receive blood tests to detect the indicators of blood creatinine, cystatin C, blood uric acid, urea nitrogen and β2 microglobulin. In addition, usually the danger of hyponephrosis is relatively large, patients need to actively follow the doctor’s instructions to receive treatment after diagnosis.