I have bright red, bloody stool, but no pain or any other discomforts. What should I do?

Get medical eval. 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.
Colorectal surgeon. Possibilities include hemorrhoids, colitis, polyps and even cancer.