The treatment of blood urea level is significantly higher than normal: 1, generally oral kidney preservation drug therapy, the most commonly used are Bailing capsule, Jin Shui Bao, the main mechanism is to improve the kidney circulation, the discharge of kidney toxins; 2, at the same time with the medicinal charcoal, the main mechanism of action is the adsorption effect, adsorption of metabolic products in the body; 3, with the application of sodium bicarbonate, calcium carbonate, erythropoietin, ferrous succinate and other drugs Symptomatic treatment. In case of transient urea nitrogen elevation, most of them can be restored to normal through renal preservation treatment. In case of chronic blood creatinine elevation, the aim of general treatment is only to delay the progression of kidney disease and preserve the residual kidney function, and in advanced stage, active renal replacement therapy such as hemodialysis, hemofiltration, peritoneal dialysis and kidney transplantation is needed.