Originally Posted by always worry
Isn't it enough to know that he has hemorrhoids that could be bleeding?
If you replace the words 'could be' with 'is' that would be one thing. It sounds like you'd be happier not knowing then finding our whats going on.
Colonoscopy's are not a big deal. Although he's generally too young for them, it could be a polyp causing the bleeding too. If you ignored a polyp at this point, by the time he's old enough to need a colonoscopy at around 50, that polyp could indeed turn cancerous.
If the doctor can't rule out the bleeding due to the hemroids, then the colonscopy does sound like the next step.
I just had my first colonoscopy a few months ago after turning 50. I had some bleeding off and on for over 5 years and it turned out I had a benign polyp. Get it checked out and get it off your mind. Again, a colonoscopy is not a big deal.