Whether the patient’s left nephrectomy has serious effects on the human body should be objectively analyzed based on whether the patient’s right kidney function is normal and the primary disease of the left kidney: a. If the patient’s right kidney function is normal and the left kidney is completely removed by surgery due to malignant tumor. In this case, the right kidney can completely compensate the function of urine excretion of the body, which will not cause serious impact on the normal life of patients. However, patients should actively protect the function of right kidney to avoid re-injury. Second, if the patient’s right kidney is incompetent and the left kidney is surgically removed due to serious infection or malignant tumor, the patient’s right kidney can not meet the function of urine excretion, the patient will develop uremia and need long-term dialysis treatment, which seriously affects the patient’s normal life.