This present a serious problem in dental work as well as the swallowing of pills and other medication . some people gag when they eat and talk at the same time . a corrective action is to low deep breath and swallowing only after exhalation .
See your self in a place and situation which might normally present anxiety and lead to gagging . then imagine yourself free of the problem . remember , as we see ourselves ,we tend to become.
The problem is gone and I will not returned . any time in the future that I fell canceled , I will stop , think and overcome..
https://youtu.be/zdXLvJHlPPQ Hypnosis course Link