The difference between bleeding from hemorrhoids and rectal cancer is distinct. For hemorrhoids, bleeding is mostly painless and intermittent, primarily manifesting as bright red blood either dripping or spraying into the toilet bowl. Patients may even experience significant blood loss, potentially leading to shock.

On the other hand, bleeding from rectal cancer usually involves blood mixed with stool and generally does not involve large volumes. Most patients present with dark-edged stool. Anemia is often detected during routine blood tests, which leads to further investigation with a colonoscopy that may reveal rectal cancer. Therefore, the bleeding characteristics of the two conditions are different. In cases where rectal cancer is suspected, proactive endoscopic examinations are recommended to confirm the diagnosis through tissue pathology, followed by aggressive surgical treatment.