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A 44-year-old female asked:

What causes black specs in my urine?

1 doctor answer1 doctor weighed in
Dr. Donald Colantino
Internal Medicine 62 years experience
Black specs: The most likely cause of black specs in the urine would be tiny fragments of kidney or urinary bladder stones. A urinalysis with microscopic examination would be helpful in identifying objects in your urine. Straining all your urine in a white handkerchief would trap the specs which can be brought to a laboratory for identification.
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Last updated May 31, 2022

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