What is the cause of bloody stool in general?

Hemorrhoids: Usually but can be many other things including infection, inflammatory bowel disease and tumors, both benign and malignant. See a colorectal surgeon sooner rather than later.

Bloody stool: Possible causes of blood in stool include: fissures, fistulas, hemorrhoids, cancer, ulcers, infections, inflammation, Diverticular disease & Angiodysplasia . Get evaluated if more than a one time occurrence.