Impaired renal function may appear urine changes (foamy urine, hematuria, etc.), edema, abdominal distension and nausea, hypertension and other systemic multi-system symptoms. 1. Urine changes (foamy urine, hematuria, etc.): After impaired renal function, a large amount of protein will be lost, resulting in a sudden increase in the tension on the surface of the urine, and a large amount of foam will appear on the surface of the urine, which is difficult to dissipate. At the same time, the color of urine can be changed such as tea-colored urine and other symptoms. 2. Edema: impaired kidney function can lead to disorders of water electrolyte and acid-base balance in the body, resulting in edema symptoms. 3. Abdominal distension and nausea: after impaired kidney function, patients will have gastrointestinal symptoms such as abdominal distension, nausea and vomiting. 4. Hypertension: impaired renal function can lead to water and sodium retention, increase in extracellular volume, etc., which affects the increase of blood pressure and the symptoms of hypertension. If patients have the above symptoms, it is recommended to go to regular hospitals for examination and treatment as soon as possible to clarify their conditions and actively treat them under the guidance of physicians to avoid further damage to renal function.