No idea actually. I've had this phobia as long as my memories go back and I don't know when my emet actually began. I cannot think of an episode specifically that caused my emet. I was just too young when it started to remember. My very earliest memories actually involve me concerned about puke. I do wish I knew sometimes what the trigger was, but I have resigned myself to the reality that I will never know why or what created the phobia. I have had ups and downs, times that were better with the phobia and times I never wanted to leave my basement corner away from everyone. Right now I actually think I'm doing a little better than I have ever been. Working on my exposure therapy a lot this summer so come next winter I will be able to handle cold and flu season better. I am determined to end this phobia. It's taken too many years of my life away from me already. It took my past, but it can't have my future.