Interpret Your Urine Blood (Hematuria) Results
Enter your Urine Blood value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.
Medical Disclaimer
This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.
Always consult a qualified healthcare professional before making any health decisions. Read full disclaimer →
Urine Blood (Hematuria) Normal Ranges
Hematuria (blood in urine) can be gross (visible to the naked eye — pink, red, or brown urine) or microscopic (visible only on dipstick or microscopy).
| Reference Range | Unit | Notes |
|---|---|---|
| Negative / Non-reactive | qualitative | Negative = normal; <3 RBC/HPF on microscopy |
Also reported in: RBC/HPF.
Why Doctors Order the Urine Blood (Hematuria) Test
Hematuria is a clinically significant finding with a broad differential diagnosis. The three most clinically urgent causes to exclude are: (1) Urologic malignancy (bladder cancer, renal cell carcinoma, urothelial cancer) — painless gross hematuria in a smoker over 50 is bladder cancer until proven otherwise.
How to Enter Your Urine Blood Result
Urine Blood (Hematuria) is usually reported as a qualitative result — for example negative or positive — so enter it exactly as it is printed on your lab report. Some laboratories also report a numeric value (RBC/HPF); if yours does, choose the matching unit.
What a Negative or Positive Urine Blood Result Can Mean
Negative (non-reactive) result
- False-positive dipstick: myoglobinuria (rhabdomyolysis — urine appears red/brown without actual RBCs), hemoglobinuria (hemolytic anemia)
- False-negative: vitamin C (ascorbic acid) can inhibit dipstick peroxidase reaction
Positive (reactive) result
- Urinary tract infection (UTI) — most common cause in women
- Kidney stones (nephrolithiasis/ureterolithiasis) — often painful hematuria
- Bladder cancer — typically painless gross hematuria in older smokers
- Glomerulonephritis (IgA nephropathy most common — presents as hematuria often after respiratory illness)
- Vigorous exercise (runner's hematuria — transient, resolves with rest)
These are common associations, not a diagnosis. A single result is read alongside your symptoms, history and other tests — discuss it with your doctor.
What Can Change Your Urine Blood Result
Before you read too much into a result, consider whether any of these applied:
- Myoglobin from rhabdomyolysis (muscle breakdown) causes false-positive dipstick blood (but microscopy shows no RBCs)
- Hemoglobin from hemolytic anemia causes false-positive dipstick blood (no RBCs on microscopy)
- Menstrual contamination in female samples
- High-dose vitamin C (ascorbic acid) causes false-negative blood dipstick
Preparing for the test: Collect midstream urine sample to avoid contamination. Women should not collect during menstruation.
Symptoms That Often Prompt Urine Blood Testing
- Gross hematuria: visibly red, pink, or brown urine
- UTI: dysuria (painful urination), frequency, urgency, foul odor
- Kidney stone: severe flank pain radiating to groin (renal colic), nausea, vomiting
- Bladder cancer: typically painless gross hematuria, intermittent
- Glomerulonephritis: cola-colored or tea-colored urine (often after throat/skin infection in IgA nephropathy), high blood pressure, edema
Want the full clinical guide to Urine Blood (Hematuria)?
Reference ranges, causes, symptoms, preparation, and FAQs.