Blood in urine (pee) is not usually caused by anything serious but you must get it checked out by a GP.
Blood in pee must be checked out because it can be a sign of cancer. This is easier to treat if it's found early.
The GP will ask about your symptoms and may need to examine your bottom (rectum), or vagina if you're a woman.
They might also:
Blood in your pee could come from anywhere in the urinary tract – the bladder, kidneys or urethra (the tube that carries pee out of the body).
If you have other symptoms, this might give you an idea of the cause. Do not self-diagnose – see a GP if you think it's blood in your pee.
It may not be blood in your pee if:
The British Association of Urological Surgeons (BAUS) has more information about blood in urine (haematuria).