Well, I've gone to some medical sites (I had the same issue myself). If it's bright red, odds are not serious. Hemmroids or others.
However, you said mostly bright. That's worrisome. You should go get it checked out. If it's nothing, it's nothing. No one wants stuff going up their butt, but I wouldn't want to be dead either. What if it's cancer? Not to scare you, but that is a sign. Ignore it long enough, and you could get the lovely, 6 months to live nothing else we can do line. All of a sudden, blood in poop won't be quite as funny.