Kidney stones do not cause an increase in urine glucose levels, but blood glucose levels can affect urine glucose metabolism. If the blood glucose level is too high, it can appear as positive urine glucose, which often indicates possible diabetes, and further fasting glucose measurement or postprandial glucose measurement is needed to confirm the diagnosis. When kidney stones are present, they usually cause irritation of the urinary tract, such as frequent urination, urgency, and painful urination, and can also cause back pain due to increased pressure in the renal pelvis, which can be intermittent or continuous. Sometimes the stones may rub against the mucous membrane and cause bleeding, or even hematuria, which requires further examination in the hospital to clarify the size and location of the stones, and then treatment such as extracorporeal shock wave lithotripsy or medication. However, the stone itself will not cause abnormal blood sugar metabolism during the above treatment, nor will the sugar content in the urine increase, so there will be no abnormal urine sugar results.