To live a long and healthy life, you must have a sound and well-functioning kidney. The kidneys are very delicate and highly sensitive to many poisons. (1) Diet should be light and easy to digest. Do not eat too much high-protein, high-sodium diet, and properly control the intake of salt and protein. Modern research shows that excessive salt is a risk factor for many diseases, especially cardiovascular and cerebrovascular diseases. Chinese medicine believes that among the five tastes, salt enters the kidney, moderate salt can nourish the kidney, too much salt will hurt the kidney. The ideal salt intake is 6g per day, the survey shows that the vast majority of China’s diet is too salty, the most serious in the north. Beijing people 14 ~ 15g per day, the northeast 18 ~ 19g per day, Guangdong people are more in line with health standards, 6 ~ 7g per day. often eat salty dishes is an important reason for excessive salt intake, should eat less salty dishes. High protein diet is an important factor in accelerating kidney function damage, and the elderly should pay extra attention to it. Normal weight people can roughly estimate the protein intake according to the following criteria: 1 egg, 1 portion of fresh milk, 100g of meat, 100g of tofu, 300~400g of staple food, plus vegetables and fruits per day. (2) Don’t drink too much water, just keep the daily urine volume at 1500~2000mL. Promote plain water, preferably drinking purified water (also called distilled water, deionized water). (3) Quit smoking and avoid alcohol. (4) Avoid infections Young people suffering from colds, pneumonia and other infections, generally do not have a major impact on the body, but also easy to cure. But once the infection occurs in elderly people whose kidney function has been declining, it is difficult to cope with this extra burden, which often leads to further damage to kidney function and even endangers life. Therefore, the elderly should strengthen their exercise and actively prevent various infections. (5) Women should pay special attention to personal hygiene during menstruation, pregnancy and puerperium to prevent urinary tract infections. Develop regular and regular habits, and avoid forcing to urinate. (6) Regular physical examination, especially urine tests, kidney function tests, early detection, timely diagnosis and treatment of various kidney diseases. (7) promote a healthy sex life, cleanliness, prevention of sexually transmitted diseases endanger the kidneys. (8) thin and slender people, to strengthen exercise, improve the contraction force of the waist and abdominal muscles, to prevent kidney prolapse. (9) Try not to use or use less drugs with strong nephrotoxicity, the most common nephrotoxic drugs, such as gentamicin, streptomycin and other aminoglycoside antibiotics, anti-tuberculosis drugs rifampin, sulfonamides, contrast agents, etc. have varying degrees of nephrotoxicity and should be avoided as much as possible. When they must be used, they must be used under the guidance of a doctor. Try to avoid or reduce contact with various toxic substances that are highly nephrotoxic.