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 during New Year’s holidays or attending too many parties in general, although the kidney function is normal, but cannot excrete too much nitrogen rapidly in a short period of time, a transient azotemia will occur. Dietary considerations for patients with reversible azotemia: 1. Low-protein diet should be the main focus in patients in the azotemia and uremia phases, and protein should be mainly animal protein containing essential amino acids, such as milk, eggs, fish, lean meat, etc. The daily protein intake is 20 grams. This not only ensures the supply of essential amino acids, but also allows the body to use non-protein nitrogen to synthesize non-essential amino acids in the case of low protein supply, thus reducing azotemia. 2, diet rich in vitamins Food should be easy to digest and contain sufficient vitamins, especially vitamins B, C, D. To avoid mechanical damage to the digestive tract from coarse food that can lead to gastrointestinal bleeding. Patients who still have good appetite during the azotemia period should have no less than 35 calories per kilogram of body weight, but by the uremic period only depending on the patient’s appetite. If the patient urinates a lot, edema is not obvious, generally do not limit the amount of water. 3, timely replenishment of water and salt Uremic patients are prone to dehydration and hyponatremia, especially in patients with long-term loss of appetite, vomiting and diarrhea. Once it happens, it should be replenished in time. However, we should pay attention to the characteristics of poor tolerance of water and sodium in uremic patients, and supplementation should not be excessive, so as not to cause hypernatremia or water intoxication. 4, pay attention to calcium and potassium supplementation Uremic patients generally have low 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 soup, etc.