Treatment options for high urea nitrogen on physical examination begin with a strict dietary regimen that requires a high-quality, low-protein diet. High-quality low-protein mainly refers to animal protein, such as lean meat, eggs, milk, 0.6-0.8 grams per kilogram of body weight per day. After dietary management, kidney function can be rechecked again after two weeks to observe whether the urea nitrogen is reduced to normal, if it is persistently elevated, it is recommended to carry out renal preservation treatment, and the commonly used renal preservation drugs are Jinshuibao, Bailing capsule, Haikun Renxi capsule and so on. Because the kidney has a strong compensatory function, such as patients with one kidney removed, there will be no urea nitrogen, creatinine level increased, once the urea is elevated, it is considered to have reached the stage of loss of compensation, and it is recommended to further perform renal dynamic imaging to assess the renal function.