Conditions that cause blood in urine include kidney problems, use of certain medications, infections, an enlarged prostate and other conditions. Urine is the formal term for the liquid waste that exits the body when you relieve yourself.
10. Rarely, bloody pee can be a sign you have cancer. If you have blood in your urine, it’s much more likely that it’s due to something like a urinary tract infection than cancer. But certain advanced cancers, like those of the kidney and bladder, can cause visible blood in your urine, the Mayo Clinic says.
But blood in your urine is not always visible, and not all visual changes in your urine indicate blood. Urine is the fluid by-product of your metabolism. Substances like urea, electrolytes, and water make up most of the contents of normal urine. Your kidneys filter your body’s waste products to form urine.