Urine tests that show elevated glucose will require further blood glucose measurements to further rule out diabetes. When the sugar level in the body is elevated, it can appear that the threshold of sugar uptake by the kidneys is exceeded, and an increase in urine sugar occurs. Possible conditions: 1. The patient has diabetes and has elevated blood glucose, which can then cause elevated urine sugar. Most of the blood sugar exceeds 10 mmol/L before the sugar threshold of the kidneys can be exceeded and a positive result of urine sugar can occur. At this time, fasting blood glucose can be measured, either by blood sampling method or by fingertip blood collection method. If the blood sugar is elevated, the patient may have diabetes and needs to undergo glucose tolerance measurement, glycosylated hemoglobin and other tests to confirm the diagnosis. 2. If the patient consumes a large amount of food containing sugar, or intravenous infusion of glucose solution, going to keep urine specimens at this time may lead to elevated sugar levels. It is recommended to take urine specimens on another day for routine examination, and prohibit the consumption of sugar-containing food or glucose infusion before the examination to exclude errors caused by diet or input, etc.