What does urine occult blood 3+ mean?

Microscopic hematuria 3+ means that after centrifugation of the urine sample, 30 or more red blood cells are observed per high-power field under a microscope, indicating an abnormal increase in red blood cells in the urine. It is a common symptom of the urinary system and may suggest the presence of an underlying disease. The following is a detailed explanation:

Microscopic hematuria is detected through routine urinalysis. One component of this test is red blood cells; even a small increase in their number can be termed microscopic hematuria. Microscopic hematuria itself can serve as an indicator. In young individuals, intense physical activity may lead to results showing hematuria 3+ and elevated red blood cell counts. Similar findings can also occur after alcohol consumption or in patients with high fever, although the urinalysis typically returns to normal once the fever resolves. The interpretation of microscopic hematuria should be based on a comprehensive evaluation of the patient's symptoms, medical history, and physical examination findings. When microscopic hematuria is present, further tests such as routine urinalysis, urine culture, and ultrasound may be performed to determine the underlying cause. If microscopic hematuria persists or is accompanied by other symptoms such as frequent urination, urgency, or dysuria, prompt medical attention and further evaluation and treatment are recommended.

Clinically, common causes of microscopic hematuria 3+ include urinary tract stones, urinary tract tumors, and occult glomerulonephritis. Patients can undergo color Doppler ultrasound of the urinary system to confirm the diagnosis before initiating treatment, which generally leads to better outcomes. In daily life, it is important to avoid smoking and alcohol, prevent staying up late, correct unhealthy habits, ensure adequate rest, drink plenty of water, and develop good lifestyle practices.