If you are avoiding a colonoscopy because you don’t want to get knocked out, they can do it while you’re awake.
If for some reason you don’t want to be anesthetized you can just ask. It is also cheaper this way and you can drive yourself home.
Based on my limited research it seems like anesthesia is mostly there because people are prude.
The painful parts of procedure doesn’t hurt any more than having bad gas pain.
And it’s only a few less-than-ten-second points during the procedure that are anywhere near what I would describe as painful.
The insertion of the camera is rather jarring if you’re not used to having things stuck up your ass, but again surprisingly painless.
I was able to watch along with the doctor on a massive tv screen and see my own innards.
Worst part was taking preparatory laxatives before.
Overall not a bad experience for the piece of mind it provided.
Get a colonoscopy if you are due or have reason to believe you should get one.