Patients with renal failure need to pay attention to the following points in their diet: First, salt intake should be strictly limited to <6g per day, and if there is high edema or hypertension that is difficult to control with medication, salt intake needs to be controlled to within 3g. If the patient is not yet on dialysis, in principle, the weight should not change much in the morning and fluctuate within 0.5 kg. If the patient is already on dialysis, the weight increase between dialysis sessions should be <3 kg. IV. Eat less foods high in phosphorus and potassium, such as vegetable soup, bananas, strawberries, cherries, and various carbonated beverages.