Andrew and food allergies?

This is what Andrew's face looks like when he eats yogurt.

Even with little hives on his face, he's still pretty stinkin' adorable, isn't he?



I introduced yogurt to him a couple months ago.  The first couple of times, he was fine with it, but the third or fourth time, he vomited it all up.  Not exactly what you want to discover at 2 am!

Our pediatrician advised trying again.  Andrew got this same type of rash the first time he ate bananas and he vomited that up as well.  We tried bananas again recently, and after being hesitant to eat them the first few tries, he eventually ate a lot of it and had no reaction whatsoever.  Yay!

But yogurt?  This is his charming red yogurt face.  Just to eliminate all variables, because I'm nerdy and analytical that way, I tried an experiment.  He broke out like this after eating organic blueberry  baby yogurt (YoBaby).  So a few days later, we tried plain organic Greek yogurt.  The same thing happened!  A few days later, I tried pureed blueberries.  Nothing!  No reaction whatsoever.  So his reaction is definitely a result of something in the yogurt, not the blueberries.
The little rash on his face goes away within about 30 minutes, and it only appears anywhere the yogurt contacted.  If I'm careful with how I feed him, he ends up with very little rash and the yogurt doesn't seem to bother him in any other way either.  His skin responds this way to a number of things he comes in contact with, including laundry that hasn't been washed in free & clear detergent, but again, it fades in about 30 minutes or less. 

Isabelle's face actually responded similarly when she had cinnamon as a baby and even a crisco-based icing that she ate when she was 12 months old.  Even six months ago, eating hummus with preservatives caused her to get a temporary rash on her face, which is why we always opt for a preservative-free hummus (like Tribe).  Hummus is her favorite food, so this is a big deal at our house. 

So what's the scoop?  Is this an allergy, an intolerance, or simply sensitive skin?  Or is this a question for my pediatrician.  In the meantime, no yogurt for my little guy.