Positive Urine Blood Tests: Kidney Stones and Beyond - Urology

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Urinary occult blood issue?


Hello Doctor: I received my health check report today, and the urine occult blood test came back positive.
I have previously tested positive for occult blood and had an X-ray of my kidneys, which showed a small kidney stone.
The doctor mentioned it was small, so no treatment was initiated.
I would like to ask if my recurrent positive urine occult blood tests are related to the kidney stone, or should I undergo further testing? Thank you!

Youyou, 20~29 year old female. Ask Date: 2020/09/09

Dr. Du Shixi reply Urology


Hello: If there is a need to check for occult blood in the urine, a more detailed examination is required if there is a history of gross hematuria.
For individuals aged 45 and older with occult blood and a history of gross hematuria, a comprehensive evaluation is recommended.
Wishing you good health.

Reply Date: 2020/09/09

More Info


Positive urine blood tests, or hematuria, can be concerning and warrant further investigation, especially when there is a history of kidney stones. In your case, the recurrent positive urine blood tests may indeed be related to the presence of kidney stones, but there are other potential causes that need to be considered as well.


Understanding Hematuria
Hematuria is defined as the presence of blood in the urine, which can be classified into two types: gross hematuria (visible blood) and microscopic hematuria (detected only under a microscope). The causes of hematuria can range from benign to serious conditions, including urinary tract infections (UTIs), kidney stones, trauma, tumors, and glomerular diseases.


Kidney Stones and Hematuria
Kidney stones are a common cause of hematuria. When stones move through the urinary tract, they can irritate the lining of the urinary system, leading to bleeding. Even small stones can cause significant irritation, resulting in blood in the urine. In your case, since you have a history of kidney stones, it is plausible that they could be contributing to the positive urine blood tests.


Other Potential Causes
While kidney stones are a likely cause, it is essential to consider other possibilities:
1. Urinary Tract Infections (UTIs): Infections can cause inflammation and bleeding in the urinary tract, leading to hematuria.

2. Tumors: Both benign and malignant tumors in the urinary tract can cause bleeding.

3. Glomerular Disease: Conditions affecting the kidneys' filtering units can also lead to hematuria.

4. Trauma: Any injury to the kidneys or urinary tract can result in blood in the urine.


Next Steps
Given that you have had multiple positive urine blood tests, it is advisable to follow up with your healthcare provider for further evaluation. Here are some recommended steps:
1. Repeat Urinalysis: A repeat urinalysis can help confirm the presence of blood and check for other abnormalities, such as protein or signs of infection.

2. Imaging Studies: Since you have a history of kidney stones, imaging studies such as a CT scan or ultrasound may be warranted to assess the kidneys and urinary tract for any stones, obstructions, or other abnormalities.

3. Cystoscopy: If the cause of hematuria remains unclear, a cystoscopy (a procedure to look inside the bladder) may be necessary to rule out bladder pathology.

4. Consultation with a Urologist: A urologist specializes in urinary tract issues and can provide further insights and management options based on your specific situation.


Conclusion
In summary, while your recurrent positive urine blood tests may be related to kidney stones, it is crucial to rule out other potential causes. Follow-up with your healthcare provider is essential for appropriate evaluation and management. Early detection and treatment of any underlying issues can help prevent complications and ensure better health outcomes. Remember to stay hydrated and maintain a healthy lifestyle, as these factors can also influence kidney health and the formation of stones.

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