I had a colinoscopy; while they were at it they banded some haemaroids.
About 2 weeks later I was out walking the dog and while he was cocking his leg I farted-a long warm fart. Guess what I found in my underpants when I got home? No, blood - lots of it! That night I had extream diareah and when I went to the toilet it gushed out - yep thats right - blood.
I'm on a tablet (astrix) that protects you against some of the problems of blood clotting (maybe the tablet she is taking is similar). Well to cut a long story short, I ended up in hospital for 4 days and the fist thing they did was take me off astrix until the bleeding stopped.
Thats my story, hope it sheds some light on the subject.