Generally, normal people drink more water in moderation has certain benefits to the kidneys, but if there are people with kidney disease, drinking more water may lead to increased burden on the kidneys, which in turn affects the cure of the disease. It is recommended that normal men drink about 1700ml of water daily, and normal women drink about 1500ml of water daily, the specific situation varies from person to person. If people with kidney disease already have renal edema and urinate too little, they should usually moderately reduce the amount of water they drink to reduce the burden on the kidneys. The kidneys are mainly composed of the renal parenchyma and sinuses, which have the role of producing urine, maintaining the water-electrolyte and acid-base balance, and ensuring the normal functioning of the body’s endocrine function. For normal people, drinking more water can increase the number of urination and promote the discharge of toxins accumulated in the kidneys and organs in the urethra, which in turn facilitates the body’s fluid metabolism. In addition, for patients with urinary tract stones and urinary tract infections, drinking more water is conducive to the discharge of stones and urinary tract bacteria, which can promote the remission of the disease. However, if long-term excessive drinking water, resulting in kidney drainage dysfunction, normal people may also cause acute water intoxication, inducing headache, nausea, vomiting, mental retardation and other uncomfortable symptoms. Therefore, the amount of water should be increased according to the degree of thirst and the amount of urination, while avoiding blindly drinking excessive amounts of water for a long time. In addition, for people who already have kidney diseases, drinking a lot of water will aggravate glomerular filtration, renal tubular reabsorption, and kidney secretion of hormones and other functional impairments, which may lead to kidney dysfunction and aggravate various kidney diseases. In serious cases, it may even cause disorders in the body’s water-electrolyte and acid-base balance, affecting the process of healing, so it is recommended that the amount of water consumed by such people be formulated under the guidance of a professional doctor.