Chemotherapy damage to the kidneys is judged primarily by the severity of the damage. Mild damage will return to normal in about 1 month, while severe damage may require dialysis treatment for a longer period of time, which may take months or years. 1. Mild damage: chemotherapeutic drugs themselves have cytotoxicity, and most of these drugs are metabolized and excreted through the kidneys. When kidney function is impaired after chemotherapy, which is simply manifested by fluctuations in creatinine clearance, you can appropriately use renal drugs to protect the kidneys, and pay attention to drinking plenty of fluids, and hydration is needed in order to reduce the side effects of chemotherapy. 2. Serious damage: chemotherapy drugs cause serious damage to kidney function, creatinine level rises sharply or patients diagnosed with acute renal failure, dialysis treatment is needed, you can choose hemodialysis to promote metabolite discharge. Patients whose renal function is damaged by therapeutic drugs should pay attention to a balanced diet and drink plenty of water, and it is recommended that they should go to the nephrology department and oncology department of regular hospitals.