as has been said there will be a lot of blood, which may make you feel a bit sick as you will likely swallow a lot of it
also i was told i could not drivce for the rest of the day as my eyes would go blurry for a few hours (!) - i got on the bus and couldn't see my money properly so i had to aske the driver to pick out the coins
it will be very hard to eat and you will look like a hamster.
take the day off
incidentally, on my way home i went into a news agents to get some mags etc to relax with and she gave me a very strange look. a few people had done the same on the way home and i figured it must just have swollen cheeks - but when i got home an looked in the mirror i was stunned and amused to see i had two little lines of dried blood that had dribbled from my mouth - a,la dracula - so no wonder i was was getting weird looks!! ha ha