Fasting urine glucose 3 + is generally more serious, may be simply caused by the use of drugs, poor blood sugar control or kidney disease. 1. Application of SGLT-2 inhibitors, if the patient uses drugs such as dagliflozin to reduce blood glucose, may inhibit the reabsorption of glucose by the kidneys, glucose is excreted from the urine, resulting in the emergence of fasting urinary glucose 3 +. 2. Poor glycemic control can also lead to urine sugar 3 +, indicating that the body’s own blood glucose rose significantly, the patient may have diabetes. 3. Kidney problems, such as chronic nephritis, for glucose reabsorption capacity decreased, can also lead to the corresponding condition suggests that the kidney condition is obviously abnormal. Fasting urine sugar 3 +, need to consult a doctor in time to check, after diagnosis of the condition in the doctor’s guidance for standardized treatment, to avoid causing delays in the condition.