Routine urine suggests urine glucose (++). Common causes include elevated blood glucose and a lowered renal glucose threshold. High blood glucose causes the renal tubules to be unable to absorb too much glucose, which is eliminated in the urine, resulting in a positive urine glucose. Certain kidney diseases can cause a decrease in the ability of the renal tubules to absorb glucose and a decrease in the renal glucose threshold. In this case, although the blood sugar is normal, urine glucose will also appear. Therefore, when glucose appears in the urine, it is preferred to check whether fasting blood sugar and intravenous blood sugar two hours after meals are normal, or to do a glucose tolerance test directly. If elevated urine sugar due to elevated blood sugar can be ruled out, further check the kidney ultrasound to rule out kidney disease. Long-term use of hormonal drugs and other diseases of the endocrine system, such as Cushing’s syndrome and polycystic ovary syndrome, can also lead to elevated blood glucose and cause positive urine glucose, and further relevant tests are needed.