Usually after donating a kidney, if you focus on the protection of the remaining one kidney no problem will occur and the life expectancy is as long as other normal people. Because the kidney has a strong compensatory capacity, only 10% of the kidney units are actually working in normal times, and the remaining 90% of the kidney units are in a rotating resting state. The one kidney left after donation is fully capable of completing the excretory and secretory functions of normal kidneys, removing metabolites and toxins from the body, and maintaining hydropower and acid-base balance. However, after all, leaving a kidney, protection is vital, it requires a long-term light diet after kidney donation, low salt, low fat diet, low purine, high quality protein diet, maintain a normal weight, quit smoking, quit drinking, prevent the renal arteries and glomerulosclerosis caused by vascular sclerosis. Regular blood glucose and blood pressure checks, urine routine, kidney function and kidney ultrasound are also required. Be sure to inform your doctor if any physical disease occurs and avoid using nephrotoxic drugs.