Constant blood in stool after eating, what could be wrong?

See MD: If you are having constant blood in your stool you need an evaluation by a physician. That would include a history and physical examination. Possible lab work and likely a GI evaluation. May just be bad hemorrhoids or could be any number of other issues. Get evaluated.

Uncertain but this: requires medical evaluation. Possible causes of blood in stool include: fissures, fistulas, hemorrhoids, cancer, ulcers, infections, inflammation, Diverticular disease & Angiodysplasia .