Do you know chronic renal insufficiency? The key specialist of nephrology and nephropathy of Southern Medical University Hospital of Integrative Medicine reminds: the causes of acute renal failure are divided into three categories: pre-renal, renal substantial and post-renal: a. Pre-renal 1, insufficient blood volume 2, insufficient renal perfusion 3, peripheral vasodilatation or infection poisoning 2, renal substantial 1, acute tubular necrosis 2, acute nephrotoxic substances 3, other 3, post-renal Urinary tract obstruction or urinary dysfunction Acute Renal failure is a clinical syndrome in which the kidney itself or extra-renal causes cause a dramatic decrease in the urinary function of the kidney, resulting in serious disorders of the internal environment of the body. The main manifestations are hypertension, oliguria or anuria, azotemia, hyperkalemia and metabolic acidosis. In acute renal failure, there are generally no clinical symptoms to warn the patient that the kidneys are not working properly, except for elevated creatinine. When the disease progresses to a certain stage, especially the uremic stage, the accumulation of uremic toxins in the body will lead to poor appetite, nausea, vomiting; itchy skin, atrophic skin; poor concentration, memory loss, distraction, insomnia; fatigue, mental depression and other symptoms, among which Poor appetite, nausea, vomiting and other digestive system symptoms are the earliest and most common clinical manifestations. Chronic renal insufficiency patients can easily reveal their chronic renal insufficiency as long as any of the urine routine, kidney function, kidney ultrasound or blood routine is examined. When you have unexplained anorexia, nausea, vomiting, think about the performance of chronic renal insufficiency is not, must go to the regular public hospital examination to identify the cause, the right medicine, delay the disease.