Reversible azotemia is a condition in which there is a significant increase in blood levels of non-protein nitrogen (NPN), such as urea, creatinine, and uric acid, called azotemia. In normal individuals, NPN in the blood is 25-35 mg%, with urea nitrogen at 10-15 mg%. Azotemia is a biochemical term that has both a broad and a narrow concept. The broad concept is that as long as the blood urea nitrogen or creatinine and other non-protein nitrogen exceeds the normal range, it can be called azotemia. A variety of kidney diseases that do not heal, late renal impairment can occur, so that the nitrogen excretion in the blood is impaired, and then accumulate in the blood, which is the result of renal failure. However, if a normal person eats a lot of high-protein food in a short period of time, such as over the New Year holidays or usually attend too many parties, although the kidney function is normal, but cannot excrete too much nitrogen rapidly in a short period of time, then a transient azotemia will occur. Kidney disease is a common and frequent clinical disease, and about 300 people per million population die from kidney failure in China every year. The current treatment of kidney disease is mostly limited to hormonal drugs, cytotoxic drugs and some conventional Chinese medicine, uremia with hemodialysis, peritoneal dialysis, etc., which can only relieve acute cases, and many are prone to relapse, or progressive aggravation. Early treatment can be recovered, the prognosis is generally good, such as the serious development of the disease to cause parenchymal damage, uremia, potassium toxicity, congestive heart failure, can lead to death. In the low protein diet is the main, diet rich in vitamin food, timely replenishment of water, salt, pay attention to calcium, potassium: uremic patients are generally low in blood potassium, after the use of diuretics is very easy to occur hypokalemia, then you can eat more fresh fruit and potassium chloride. Uremic patients often have low blood calcium, so they can eat more food with high calcium content, such as fish, shrimp, meat and bone broth, etc.