Urine glucose is the glucose in urine. Urine glucose determination is the retention of urine to determine the urine routine, which normally does not contain glucose and is negative in the urine routine test. In normal people, glucose in the blood is filtered by the glomerulus to the renal tubules, which are able to reabsorb all the glucose, so the urine does not contain glucose. However, there is a limit to the ability of the renal tubules to reabsorb glucose, and glucose will appear in the urine when the limit is exceeded. The blood glucose concentration when glucose appears in the urine is the renal glucose threshold. There are two reasons for the appearance of glucose in the urine: First, elevated blood glucose, when the blood glucose rises significantly, exceeding the renal tubular capacity to reabsorb glucose, there will be a positive urine glucose in the routine urine examination, with the increase in blood glucose concentration can be expressed as (+) to (++++). Second, the renal sugar threshold decreases, when the renal sugar threshold decreases despite normal blood glucose, there will be positive urine sugar, mostly seen in patients with kidney disease, but also seen in pregnant women with normal blood glucose.