Stumped

The intent of this blog is to actually pick your brains. You are all such creative people, I am sure you can help me come up with some interesting results should you tickle a dragon who has a bad case of the flu.
Let me explain: the story I'm currently working on, my fairy Abby runs a bakery with her pet dragon. When he gets sick and he can't blow fire anymore all these specialists come up with ways to ignite it again. One way I thought of was to tickle him, but I just can't seem to think of a really good disasterous result of such an action. I'd like to hear your ideas on this one.
So...what could happen when you tickle a sick dragon?