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I have noticed most recently there are quarter and dime sized blood stains on my underwear, sometimes as much as 2 or 3. I have had 3 kidney stones in the past and have been told i have a "tendency" to grow stones In the past i have passed 2 of the 3 stones and only needed surgery one time and i was wondering, could this be from small stones that are jagged and passed in the normal urine flow. The situation seems to be more frequent, at first it was only once every few months, but not it seems to be about once every 2 or 3 weeks.
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replied June 30th, 2017

Welcome to e health forum.

Renal stones and Cysts can sometimes cause bleeding in urine (Hematuria). Other causes of blood loss, such as tumors of the kidney, infarction, and arteriovenous malformations, can also cause blood loss into the urinary space.

Renal stones can block the urinary flow, and damage the mucosa resulting in bleeding, and hence blood in urine. Such blockage of urine would be the cause of enlargement of the kidney (hydronephrosis)

Renal cysts can present with either microscopic or gross hematuria.

It would be recommended to seek a consultation with your doctor or a urologist who can evaluate the current status and provide appropriate medical advice.

I hope this helps

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