Kidney is an important organ of human body, a healthy body is absolutely inseparable from a healthy kidney. The appearance of nephritis is a nightmare for human health, it affects human health and also induces a series of adverse symptoms, one of which is the appearance of edema. Some people not only ask, “Isn’t nephritis an inflammatory disease that occurs in the kidney area? How can edema occur in the body after getting nephritis? This is not logical, in fact, it just represents the ignorance of these people about the function of the kidneys. The kidney is the main organ of the body for drainage and sodium, and it is natural that when the kidney is abnormal, water and sodium are retained in the body and edema is formed. The pathogenesis of edema is not complicated either. When nephritis occurs, because the detoxification function of the kidney is interrupted by some other substances, which leads to gradual sclerosis of the glomerulus, interstitial fibrosis of the renal tubules, and fibrosis of the renal blood vessels, the kidney almost becomes an accumulation of extracellular matrix, and the excretory function is basically lost, resulting in water not being discharged from the body and retained in the body, thus nephrogenic edema occurs. In a small percentage of patients with nephritis, congestive heart failure is induced due to increased blood volume and hypertension, which aggravates water and sodium retention; capillary fluid hydrostatic pressure increases, causing excessive migration of intracapillary fluid to the tissue interstices and resulting in edema. Edema due to nephritis, during the treatment of nephritis, attention must be paid to reduce the intake of sodium and potassium, otherwise it is a very serious consequence. It is also important to clearly understand that kidney disease can be life-threatening. As soon as you notice abnormalities in the kidneys, even if there are no symptoms of kidney disease, you should not ignore them and treat them early and symptomatically. Because there are some cases that do not go through the process of chronicity, the rapid development of renal failure, to this time is the return of the day.