Normally urine sugar is negative, and glucose only appears in the urine when the blood glucose exceeds 8.9 mmol per liter. When urine sugar increases, it can appear from (+) to (++++), so urine sugar (++++) represents a state of relatively high urine sugar concentration, so elevated urine sugar is indicative of the possibility of elevated blood glucose. If elevated blood glucose leads to 3 plus signs in urine glucose, it generally indicates a very significant elevation of blood glucose, often greater than 10 mmol per liter in fasting glucose, and requires evaluation and treatment at a hospital endocrinology department as soon as possible. However, in addition to elevated blood glucose leading to elevated urine glucose, some drugs can also lead to increased urine glucose. SGLT-2 inhibitors among hypoglycemic drugs, such as dagliflozin, kagliflozin, and enagliflozin, can lower blood glucose through renal excretion of glucose, so urine glucose can increase or even reach 3 plus after taking these drugs, and these patients generally cannot assess their blood glucose through urine glucose, and need to undergo blood glucose and glycated Blood glucose and glycated hemoglobin tests are needed to assess blood glucose more accurately.