The kidneys are an important organ in the body for excreting metabolic waste and maintaining a stable internal environment. Kidney disease causes its function to diminish and metabolic waste retention occurs, damaging body organs, especially the heart. That is why kidney patients are more likely to have heart disease. Kidney disease is very common in the population, with a prevalence rate of about 10%, and some patients will develop uremia, which not only leads to physical suffering, but also brings a very heavy financial burden to the family. The normal kidney is the size of a fist, and as we age, the kidney gradually shrinks and its function gradually decreases. When blood flows through the kidneys, the metabolic wastes in the blood are filtered through the filtration membrane in the kidneys to be excreted in the urine, when the blood vessels are damaged, it will lead to the reduction of the filtration membrane area and the decrease of kidney function, so we should quit smoking and other bad habits to make the kidneys age slower. The kidneys cannot function without water. It is assumed that the kidneys do not have diseases and function well enough to filter the blood coming in, but if there is not enough blood flowing into the kidneys, two problems will arise: one is that the metabolic wastes in the blood cannot be excreted sufficiently, resulting in the retention of metabolic wastes in the body; the other is that the urine volume will decrease, resulting in a higher concentration of metabolic wastes in the urine, which cannot even be dissolved sufficiently in the urine and form crystals, resulting in kidney stones over time. To ensure adequate blood supply to the kidneys it is necessary to drink more water, which is also the theme of this year’s World Kidney Day. Drinking more water is conditional: (1) Do not eat too much salt. The main component of salt is sodium chloride, which, when consumed in excess, can lead to an increase in the concentration of sodium in the blood. The body strictly regulates the concentration of sodium in the blood and other body fluids and does not allow it to be too high. The way it is regulated is by maintaining more water in the blood vessels, which can lead to too much water in the blood vessels, which can produce high blood pressure or make the already high blood pressure difficult to control. (2) Although drinking more water can make the kidneys work properly, drinking water itself does not treat kidney disease, and drinking more water can be dangerous for some people with kidney disease. In daily life, there are some habits that can inadvertently damage the kidneys, especially the most harmful with random medication. The kidneys are an important organ for excreting metabolic waste, and also for excreting most drugs or their metabolites, so drugs or their metabolites can easily damage the kidneys; reduced kidney function can lead to drug or its metabolites retention and poisoning, so never use drugs indiscriminately. (1) Although it is a normal aging phenomenon for the elderly to have reduced kidney function, their kidney function has been reduced after all, and the regular dose in the drug instructions is already a large dose for the elderly. (2) Chinese medicine is not always safe. It has been proven that some herbs contain aristolochic acid that can cause not only kidney damage, but also tumors in the urinary tract, including Guanmutong, Guang Fangji, Qing Mu Xiang, etc. (3) When you have a cold and fever, people tend to take antipyretic drugs on their own, and some antipyretic drugs can damage the kidneys, especially when you don’t want to eat when you have a fever, the blood volume is insufficient, the blood flow to the kidneys is reduced, the concentration of antipyretic drugs in the kidneys is increased, and the possibility of kidney damage is greater. To do not use drugs indiscriminately, you should do not use them if you can; when you have to use them, you should not use an IV if you can solve the problem orally. Diabetes and hypertension are two culprits that damage the kidneys, and they have long been an important cause of heart disease and uremia in Western countries. As our economy improves, these two diseases cause an increasing proportion of all UTI causes. Patients with diabetes or hypertension are more likely to develop heart disease or kidney injury when they have a combination of smoking, obesity, hyperuricemia, and hyperlipidemia. The early stage of kidney damage has no symptoms and shows only a small amount of proteinuria, which is difficult to detect without urine examination. Therefore, it is recommended that hypertensive and diabetic patients should not only control their blood pressure and blood sugar well, but also have regular urine tests to detect kidney damage at an early stage.