I am experiencing urinary tract bleeding, mostly nocturnal. Over the last couple of weeks I have noticed blood spotting on my pajamas when I get up in the morning but nothing during the day. However, yesterday morning as I was preparing to shower, I experienced a experienced a short stream of pure blood from my urinary tract. I have had kidney stones in the past, but I m not experiencing any of the pain I ve had with them in the past. I had radiation treatment for prostate cancer ten years ago and regular check ups have not revealed any recurrence. What could be causing this problem and should I be concerned or is it likely to go to go away on its own? Thanks for any advice you might have for me. Dick