The colonoscopy would rule out most of the lower GI diseases.
Loose bowel movements can also increase the incidence of rectal discharge. Sending off the stool for culture, ova, parasites and evaluation for fat malabsorption can be considered.
Finally, there is the possibility of anal sphincter problems. An endorectal ultrasound or anal sphincter manometry can be considered if this is suspected.
These options can be discussed with your personal physician or gastroenterologist.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin, M.D.
kevinmd_b
Unfortunatly, I have nothing to offer you other than understanding. It would be nice to speak with you about any other findings or advise.
Brad28