Enuresis refers to a person who urinates less than 100mL in 24 hours or no urine in 12 hours, which can lead to enuresis in serious cases. Urinary atresia is a disease in which difficulty in urination is the main cause, and in severe cases, no urine is excreted, and there is an unfavorable shortage of urine as a symptom. It is mostly seen in patients with severe shock and acute renal failure. When the kidney function is abnormal, the urine cannot be non-existent in time, and toxins will accumulate in the body and cause toxic symptoms. Renal failure is not enough simply by drug treatment, but also in daily life pay attention to diet. 1, sodium intake: edema should be into a low-salt diet, so as not to aggravate edema, generally no more than 2g of salt per day is appropriate, banned pickled foods, less MSG and alkali, edema subsided, plasma protein close to normal, you can resume the ordinary diet. 2, protein intake: renal failure syndrome, a large amount of plasma protein excretion from the urine, the human body protein decreased and in a state of protein malnutrition, hypoproteinemia so that the plasma colloid osmotic pressure decreased, resulting in edema stubbornly difficult to eliminate, the body resistance also decreased, so in the absence of renal failure, its early, extreme phase should be given a higher quality protein diet (1 ~ 1.5g/kg * d), such as fish and meat. such as fish and meat. This helps to alleviate the hypoproteinemia and some of the ensuing comorbidities. However, a high protein diet can increase renal blood flow and glomerular filtration rate, putting the glomerular capillaries under high pressure, and also increase proteinuria with high protein intake, which can accelerate glomerulosclerosis. Therefore, for chronic, non-polar renal failure syndrome patients should consume a small amount of high-quality protein (0.7 ~ 1g/kg*d), as for the emergence of chronic renal impairment, it should be a low protein diet (0.65g/kg*d). 3, fat intake: patients with renal failure syndrome often have hyperlipidemia, which can cause arteriosclerosis and glomerular damage, sclerosis, etc., and therefore should limit the intake of animal offal, fatty meat, certain seafood and other foods rich in cholesterol and fat. 4, trace elements supplementation: due to increased permeability of the glomerular basement membrane in patients with renal failure syndrome, in addition to the loss of a large amount of protein in the urine, but also the loss of certain trace elements and hormones combined with protein, resulting in the lack of calcium, magnesium, zinc, iron and other elements, should be given appropriate supplementation. Generally, you can eat vitamin and trace element-rich vegetables, fruits, grains, seafood, etc. to supplement.