This post intrigued me, because I, too, have had a bout with blood in the urine. I went to the doctor and they were all highly concerned, but after tests and all, there was no real diagnosis. But I gave myself one.
I have had three episodes of kidney stone attacks where I had to be hospitalized. Had follow-ups with urologists. I have the type of stones that can't be dissolved. But, anyway, even though there was no bleeding with these stones, when I had the episode of bloody urine, my theory was that I may have been passing a very small stone, even though there was no pain associated with it. (Occassionally I get sensations in my upper urinal tract that are sharp little pains.) Kidney stones, I would think could cause scraping of the urinary tract or perhaps even the bladder because they sometimes have sharp points and barbs. So could it be possible that a small stone trying to pass causes a tear somewhere? Also, there can be blood in the urine and you'd never know it unless you had a urinalysis test done.
It's a thought.
Granted, though, some of you seem to have other reasons that could be causing your bleeding.
[This message has been edited by not2bad (edited 05-01-2003).]