Changed diet and lips got worse!?

So I just cut out wheat and dairy from my diet this past week (not related to EC; completely different reason), and my lips basically went back to how they were almost a year ago. I am completely baffled.

Recap of my story:

-my ec is from biting my lips
-stopped biting/chewing/licking/otherwise traumatizing my lips in spring 2011. Have had a few setbacks but for the most part have stuck to it.
-discovered last winter that SLS (sodium lauryl sulfate) makes my lips worse, and when I cut that out they improved significantly.
-for the last few months, my lips have been really good. I've hardly noticed them and they weren't really peeling. Until now!

Just wondering if anyone else playing around with diet has experienced this? And why? Ideas? Very strange.