can anyone explain what blood in the stools looks like...I have noticed a small mark about half the size of a grain of rice, only one that I could see, the colour of a small piece of tomato or red pepper...which I was eating two days previous.

is the bleeding in stools so obvious as to be unmistakeable with the like of an IBD?

I am aware that some blood can be undetectable in the stools from other less severe conditions