Does blood in my poo mean I have bowel cancer?

While blood in your poo can be a sign of bowel cancer, it can also be caused by several other conditions, such as haemorrhoids (piles), bowel polyps, gastroenteritis, diverticulitis, and inflammatory bowel disease (IBD). If you notice blood in your poo, in the toilet, or on the paper after wiping, make an appointment with your GP.