Your post and mine just go to prove everyone has a different cause.
It's so crazy! I can eat four bowls of ice cream and drink a bunch of soda and not
have a breakout but if I injest a freaking MOLECULE of gluten my face explodes for a week! No kidding. Ugh ugh ugh.
But I agree with you that Sugar is a cause for a lot of people, and gluten is another. Sugar gluten and dairy are probably three main food causes but there could be others.