Colonoscopy

[Khaleesi]

As far as i know they don't do full GA only light ones, but i've never has any trouble & i've had 4 all up with many more to go.
You'll wake up feeling really gassy from all the air they pump inside & slighty groggy from the sedation.

I really don't know how often you'll have to get them, as i have them because of my illness.
In saying that i have them every 2 years so they can detect anything abnormal early enough to do something about it, so you may need them this often as well or you might be lucky and it's only every 4yrs etc..

ETA.. They can usually tell you straight away if there are any polyps or if there is something abnormal, i'm yet to have this problem but i can guess it would take a few days/weeks to get results.
As for pain you can ask them from something stronger if you need it