The 9th is World Kidney Day. The clinical symptoms of some kidney diseases are not obvious, and most people rarely feel kidney discomfort. Therefore, kidney disease often presents the characteristics of high prevalence and low awareness. What kind of abnormality in the body is that the kidney is "alarming". How to better nourish and protect the kidney? Recently, the reporter interviewed many experts to answer these hot issues that people care about. "Kidney disease is known as the 'silent killer'. Because the disease signal is not obvious, it is easy for people to ignore this organ, resulting in many people finding themselves seriously ill when they are ill." Niu Tieming, director of nephrology department of Shenyang Red Cross Hospital, said that kidney disease is not completely traceable. She suggested that when our body has the following abnormalities, we should consider the early signal released by kidney disease. First, the number of foam urine increased, and the urine color deepened and reddened; Second, the number of nocturnal urination increased, including frequent urination, urgency and pain in urination; Third, the eyelids and lower limbs are often swollen; Fourth, blood pressure increased. "If these conditions exist, it is recommended to carry out systematic troubleshooting through routine urinalysis and other tests," said Niu Tieming. How can we protect kidney scientifically? Wang Yan, director of the Department of Urology of Shenyang Fifth People's Hospital, said that regular physical examination is very important. "It is also important to cultivate a healthy lifestyle. In daily life, we should drink more water, do not hold urine, pay attention to regular work and rest, do not stay up late, and drink moderately." Wang Yan said. In terms of diet, Niu Tieming suggested that the salt in the food of hypertension patients should be controlled at about 3 grams per day, preferably less than 3 grams; People with kidney disease should control the intake of protein. In special cases, they should follow the doctor's advice and choose high-quality protein such as milk, eggs, lean meat, etc; Eat more foods rich in vitamin B and vitamin C. (Xinhua News Agency)