This is what I suspected also. I have had health problems when none of my family has history of it.
Thanks so much. :)
Rectal bleeding is never normal and a colonoscopy is probably the most comprehensive test to determine the cause especially if the minor visible causes such as anal fissure and haemorrhoids have been discounted.
For possible causes of rectal bleeding type in rectal bleeding to google/yahoo etc and click onto one of the sites that describes causes, symptoms, treatments etc etc.
Although you are very young to have developed colon cancer, there are cases where this disease has been noted in patients of your (and younger) age and, from the search I suggested above, colon cancer will be mentioned.
I'm not trying to scare you - but, in similar postings, quite often the patient asks "could I have colon cancer"? Again, I'm not trying to put thoughts into your mind, but if your own "thought-process" runs along similar lines, then the colonoscopy is probably the best test to provide (hopefully) maximum reassurance.
Good luck
regards
Morecambe