Occasional excessive urination in children is considered to be caused by drinking more water or eating diuretic foods. If there is repeated excessive urination, then uremia or other diseases are suspected. 1, if there is a previous cranial injury or infectious encephalitis, meningitis. This may cause damage to the brain tissue, leading to a decrease in the synthesis of vasopressin and causing central uremia. In hereditary nephrogenic uremia, there is a lack of response to vasopressin and increased urinary output. For the treatment of uremia, the main option is hormone replacement therapy, such as the use of desmopressin, ellagitropressin injection, and posterior pituitary hormone. Other drugs are hydrochlorothiazide. Chlorosulfonylurea. 2. Chronic pyelonephritis, diabetes, can also cause an increase in urination. This condition is associated with the disease and usually manifests itself during the course of the disease. It is accompanied by other symptoms. Pyelonephritis can have the knocking pain of kidney deficiency and generalized fever. Diabetes can present with physical wasting. Most of the symptoms of polyuria will be relieved after active treatment. Urinary tract infections in children can also cause an increase in the number of urination, but most of the total urine volume is normal, you can check a urinary routine to clarify the diagnosis. For children with excessive urination should be systematically examined to identify the cause and then standardize the treatment.