Which treatment works the best and fastest for bloody diarrhea?

May be serious issue. Bloody diarrhea is not normal and deserves medical evaluation! blood on toilet tissue or as a self-limited streak of blood on stool may be hemorrhoidal, anal fissure, or a local rectal process. However, seeing blood with diarrhea may be due to invasive infection, inflammatory bowel disease, ischemic colitis, caustic or mechanical damage (colonics), or even a brisk upper GI bleed. See a doctor!