If you see blood in your urine, that's almost never a good sign. Blood in the urine can be caused by kidney or bladder infection, and it can indicate cancer.
It's not always apparent. Sometimes you have to use a microscope to be sure.
But if you actually see red, see a doctor right away.
Unless you're the do-it-yourself type; then you can investigate yourself.
Chen from Zhejiang Province in east China was too worried to go to the doctor, so he explored his urinary tract from the most accessible opening by inserting a chopstick in his penis.
As the x-ray picture shows the stainless steel utensil reached the great rectal wall. Surgeons were able to eliminate it without additional damage.
Chen was admonished not to take his urinary system into his own hands.
Caution: Do not insert in penis.