Hi, while i think it is unlikely that this could have been a post symptom of a colonoscopy i wouldnt completely rule it out. And numbness of any sort really does need to be looked into. I think anything that causes your attention to it and to worry should probably be checked out by a doctor if for nothing else than to set your mind at ease. It could be perhaps symptoms attatched to whatever you had that resulted in you needing to have a colonscopy it is very hard to say, but i think a trip to even your GP could be a good idea.