Urine dry with white powder, it is recommended to go to the hospital for relevant urine laboratory tests, the possible causes: First, urine contains more inorganic salts, such as sodium chloride, potassium chloride and other components, which can appear white after urination dry, as human sweat, after drying on clothes, containing more sodium chloride will appear white powder. Generally there are no symptoms of urinary tract irritation, and the patient does not have any urinary discomfort, it is recommended to drink more water and urinate more, mainly in summer, too much water loss and insufficient rehydration can be easily seen; secondly, if the urine sugar is too high in the patient, after urination can also appear after the urine is dry there will be white powder, which may be related to the increased sugar content in the urine, and after drying the sugar analysis out and other factors. It is recommended that a routine urine examination be performed to find out if there is an elevated level of urine sugar, and it is also recommended that a blood glucose measurement be performed to further rule out the presence of diabetes.