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Doctor insights on: Black Specks Urine

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I'm 20yo guy.Passed a tiny black speck in urine at the beginning of urine stream.What might have caused it?Scared of bladder, urethral and such cancers

I'm 20yo guy.Passed a tiny black speck in urine at the beginning of urine stream.What might have caused it?Scared of bladder, urethral and such cancers

Concretion: I went to answer your question and tell you to get checked for kidney concretions, and lo-and-behold, you've already had kidney stones and concretions diagnosed on scan. That's almost certainly the source. ...Read more

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Dr. Peter Kurzweil
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Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


Dr. Peter Kurzweil
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44 years in practice
16M people helped
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I had about 20-30 black speck in my urine. Urgent care said test neg for stones. Must have passed all of them. 2 month later I am passing 1-2 a week?

I had about 20-30 black speck in my urine.  Urgent care said test neg for stones. Must have passed all of them. 2 month later I am passing 1-2 a week?

Urinary stones: it sounds like you need a thorough evaluation for urinary stones by a urologist. Urinalysis is rather nonspecific for stones. I would suggest you have a kidney stone protocol CT scan of the abdomen & pelvis to detect the presence of even small stones in your urinary system. ...Read more

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Dr. Peter Kurzweil
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44 years in practice
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I am a female and my urine is black?

I am a female and my urine is black?

Never normal.: Needs explanation. Best bet is to get a urinalysis and see doc. Could be blood or bilirubin or a few other things, but lab will tell. ...Read more

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I hurt during urine 45 black , male?

I hurt during urine 45 black , male?

Painful urination: Painful urination is not normal and may signal inflammation or infection. Please see your doctor, who will take a complete history, perform an examination and order appropriate tests to sort this out. ...Read more

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What is wrong when your urine comes out black?

What is wrong when your urine comes out black?

Dark urine: Brown or black urine (not due to myoglobin or bilirubin) may be caused by excessive L-dopa or melanin excretion as well as copper or phenol poisoning. Ingestion of large amounts of rhubarb, fava beans, or aloe can cause dark brownish black urine. More info at http://urology.stanford.edu/about/articles/abnormal_urine.html ...Read more

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I hurt when I urine I am a black male 46?

I hurt when I urine I am a black male 46?

Dysuria: This is not normal. Could be an infectious or inflammatory process. I would see you primary care doctor for an exam, urinalysis and to discuss possible causes. ...Read more

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From Time to time I pass solid black particles in my Urine. What can cause this to happen?

From Time to time I pass solid black particles in my Urine. What can cause this to happen?

Prostate calculi: Small calculi in the prostate are a normal part of aging and some of those may be coming out in the urine. It would be prudent to mention this to your doctor at your next visit. ...Read more

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Dr. Peter Kurzweil
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44 years in practice
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