A single kidney is called an isolated kidney in medical terms. If there is no lesion in isolated kidney, the life expectancy of patients is the same as normal people; if there is a lesion, such as chronic nephritis or other aspects of the disease, then they may live about 10 years. Although the incidence of isolated kidney is not very high, it can be seen in clinical practice. In most cases, this kind of patients are found by chance when they are examined and found to have one kidney. If this kidney does not have nephritis, hydronephrosis, kidney stones and other diseases, then it can adequately detoxify and drain, it does not affect the life expectancy of patients, and the survival life expectancy is the same as normal people. However, if the kidney has underlying diseases, such as nephritis or other diseases mentioned above, then it may develop into chronic renal failure and finally uremia, which will have a greater impact on the patient’s life expectancy. Therefore, for patients with isolated kidney, it is important to review urinary routine, kidney function and urinary ultrasound dynamically. In addition, avoid taking random medications, especially those that can cause kidney damage.