Quoting FeliciaAnn:" My 3yo has the weakest gag reflex. I've never met another child like her. She will see something with ... [snip!] ... her! Do I ignore it? I've tried to talk to her about it, but it doesn't make a bit of difference. I'm at a bit of a loss here."
Is it certain textures? I can't eat mashed potatoes, or anything like that. It has always made me gag. DD just doesn't like certain foods, and will gag on them, but she is a bit of a drama queen. My parents never forced me to eat anything with the texture they knew I hated, since it would only end up back in my plate. If it's certain things, I wouldn't worry. If it's like, everything, maybe talk to her pedi about a sensory issue.