L.P.
Hi D.,
I am a RN and work in a recovery room of a surgery center.. We do that procedure on kids pretty often.. Every place is different, so they may or may not give him medication to relax him before the procedure.. When he wakes up he may be sleepy, might be confused and need to be reminded that the procedure is over.. He should be comfortable b/c they usually put local in to numb the area, but if he is in pain the staff will medicate him.. If you have any questions feel free to send me a message (I'm not familiar w/ the procedure itself, just pre and post op)
Good luck!