Urine test glucose 4+, does not necessarily mean that it is diabetes, because some kidney disease and physiological factors may also lead to urine test glucose 4+. It is recommended to consult a doctor in time, under the guidance of the doctor, to clarify the cause of urine glucose 4 +. Normal human urine urine glucose is negative, and will not detect a positive urine glucose, often in the blood sugar is too high before a positive urine glucose, so that the discovery of urine glucose 4 +, mostly suggests that the patient has got diabetes. However, the diagnosis of diabetes is based on blood glucose, not urine sugar. Certain hereditary kidney disease and physiological factors of patients, even if they do not have diabetes, may also appear urine sugar 4 + such a situation, such as certain hereditary kidney disease, interstitial nephritis, may cause the decline in the ability of the kidneys to reabsorption of sugar, so that the renal glucose threshold is lowered, the emergence of urine glucose 4 +, but the blood glucose is normal. Therefore, if you find 4+ urinary glucose, you should go to the hospital for further blood glucose tests, and diagnose whether the patient has diabetes or not according to the level of blood glucose.