What does glucose in my urine mean?
Glucose in your urine usually means your blood sugar has been running high. Sugar spills into urine only when blood sugar rises above roughly 180 mg/dL, so a positive urine test deserves a proper blood test promptly.
Exceptions exist: pregnancy lowers the spill threshold, and some diabetes medicines work precisely by sending glucose out through urine, making the finding expected.
Urine tests screen; blood tests decide. Book a fasting glucose or HbA1c rather than repeating dipsticks.
Source: American Diabetes Association, Standards of Care in Diabetes
See a doctor promptly if
- Hemoglobin well below the normal range with breathlessness, chest pain, or dizziness on standing
- Potassium below 3.0 mmol/L or above 6.0 mmol/L. This needs same-day contact, not a routine appointment
- A sudden large rise in creatinine, or a new drop in eGFR, especially with reduced urine output
- Liver enzymes several times the upper limit with yellow eyes, dark urine, pale stools, or right upper abdominal pain
- Platelets under 50 x10^9/L, or a very high or very low white cell count with fever
What glucose on a urine dipstick means
| Result | In short | What it means |
|---|---|---|
| Negative | Expected | The kidneys reabsorb all of it below a blood level of roughly 180 mg/dL, so nothing shows. |
| Trace to 1+ | Check the blood | Can follow a very large, very sweet meal, or pregnancy, where the threshold drops. It still earns a blood glucose test. |
| 2+ or more | Blood test now | Usually means blood sugar has been over about 180 mg/dL. Diabetes is the first thing to rule out. |
| Positive with normal blood sugar | Renal glycosuria | A harmless inherited low threshold, or the expected effect of an SGLT2 medicine such as dapagliflozin or empagliflozin, which work by putting sugar into the urine. |
| Positive with thirst and weight loss | Same day review | Glucose in urine alongside heavy thirst, passing a lot of urine, or losing weight is the classic presentation of new diabetes. |
One result is a snapshot. Ranges differ a little between labs, and what a number means depends on the rest of you. Check it against the guidelines.
Work out what your blood sugar meansneeds a meter, free, nothing to install
Look up another result
A result is rarely the only one on the page. Each of these gives the bands, in both unit systems, and what happens next.
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Answered by the AskDoc Medical Team · Medically reviewed under our Medical Director, MBBS · How we review
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