It is given either through a plastic mask over the mouth and nose or through nasal prongs. If the oxygen dries out the child's nose or the nasal prongs seem to be an irritation, tell the nurse, but don't take off the oxygen on your own. It opens the tubes going to your lungs. Take a deep breath, hold it as long as you can, then let it out. Do this 10 times in a row every hour you're awake.
Ice also cools a sore throat and eases the pain.
Once any vomiting has stopped, it's safe to drink water or fruit juice, or suck on popsicles. To ease pain, you may put ice in a plastic bag, cover it with a towel, and place it over the throat for 15 to 20 minutes out of every hour as long as necessary. Remove the ice pack before sleep. Treatment with ice is most effective when started right after surgery and used for 24 to 48 hours. A cool-mist humidifier in the bedroom will help to reduce throat soreness and coughing.