Originally Posted by
NealH
Sounds like a kidney stone (still in the kidney) but it could be something else too. Lack of hydration can darken the urine but it should not include blood in it. If you are on some fashion diet then get off it. Dieting often leads to hydration and protein breakdown issues. Riding hard requires normal eating habits. My guess is that if your eating habits and healthy, then its a kidney stone.
I eat really healthy. I had a kidney stone about 7 years ago. One thing I can say is this winter I admit to being really bad about drinking enough water. But as of last few months (since my first hard ride) I have been drinking a lot of water.