My problem is there is the feeling of something in the back of my throat that causes me to get an involuntary urge to gag. I however have never actually gagged because when ever I get this feeling I immediately suppress it by swallowing hard or stroking the palate with my tongue. I have noticed this happening when I am running and even normal things when I am just talking. The main thing that is really bad about this, is my inability to run and exercise to stay in shape because of this problem. After a few minutes of running or exercising I get that feeling of having to gag. I have told doctors about this and one doctor said about the post nasal drip causing it and the other said I had a hyperactive gag reflex and I just have to live with it. What it feels like is that my uvula gets irritated somehow and it stimulates the reflex for no reason. I am currently taking swimming lessons, but this problem makes it almost impossible because when I am blowing the air out through my nose in the water, this also causes me to feel that sensation of gagging which causes me to stop to catch my breathe. I understand that there are many people who have an overactive gag reflex, but I have not read about it being to hyperactive that it affects someone like the way it does to me.