Also, if you don't mind me adding, apparently in adults you can try this excise to help manage overactive gag reflexes:
- Place your finger on your tongue and slowly move it back towards your throat until you feel the gag.
- Stop when you do; do not remove your finger.
- Then, take 3 - 4 slow, deep breaths through your mouth.
- Stop and start taking deep breaths from your nose.
- Again switch back to your throat and continue taking a few more breaths until the urge to gag subsides.
- Now repeat the entire procedure again.
Apparently this exercise will definitely help you to control gag, good luck and hope this has helped.