The presence of (+) in urine sugar indicates that there is glucose excretion in urine. In normal people, blood sugar is normal and most of the glucose in urine is reabsorbed by the kidneys and reused, so there is no (+) in urine sugar. If there is (+) in urine sugar, check the patient’s blood glucose level. If at the same time a significantly elevated blood glucose level is found, be alert to the presence of diabetes mellitus and visit the endocrinology clinic. If the patient’s blood glucose is in the normal range and at the same time the urine sugar checked still has (+), you can ask the patient if he or she is taking relevant medications recently. Medications that can affect the urine sugar like new hypoglycemic drugs such as Dagliflozin control the blood glucose at a normal level by promoting urine sugar excretion, so the urine sugar (+) may be due to medications. In addition, urine glucose (+) can also occur in patients with kidney damage, such as Fanconi syndrome. Therefore, the presence of urine sugar (+) requires a visit to the hospital to clarify the cause.