Pooing a brick.
It's only to remove a nasty seborrheic keratosis (apologies for spelling, ruddy spell check is no help).
I don't know if I should drive, or get a taxi.
I am assuming a local anesthetic, how long till I feel pain again afterwards.
You'll be just fine, everything is so well controlled nowadays, nothing to worry about, I had surgery (GA) on 13th, no pain, no probs, all handled brilliantly.
The Op. will be fine, if you need to you can always stay in the Surgery for a while afterwards, speak to the receptionists, they will keep an eye on you, no need to leave until you're happy to do so.