Urine glucose 3+ may be transiently elevated, which is not serious, or recurrently or persistently elevated, which is more serious and may cause urinary tract infections and diabetes-related complications, etc. It is recommended to consult a doctor. If a patient with diabetes mellitus has a transient urine glucose 3+ under stress, it is usually not serious and the symptoms will disappear after the stress. However, if it is caused by the aggravation of diabetes mellitus due to poor glycemic control, it suggests that the condition is more serious. Urine sugar can easily lead to an increase in the frequency of urogenital infections. Urine contains a lot of acid, and bacteria like to breed and multiply quickly in an acidic environment, which can easily cause urinary tract and genital infections. Secondly, if the urinary sugar is caused by long-term poor glycemic control, patients are likely to develop diabetic ketoacidosis, hyperosmolar coma and other acute complications of diabetes, long-term poor glycemic control will also cause diabetic nephropathy, diabetic foot, diabetic retinopathy, peripheral neuropathy and other chronic complications. Urine sugar patients need to pay attention to, it is recommended that timely medical treatment, identify the specific causes of the disease, under the guidance of the doctor to actively carry out treatment.