Baby's first fat lip

We're not exactly sure what happened, but sometime between preparing and eating dinner, Shortie got a fat, bruised lip. We've noticed lately that she sucks pretty vigorously on her bottom lip, and of course, she shoves every toy she has into her mouth, so maybe those things are to blame. Whatever the cause, she doesn't seem to be in any pain. Also, as you'll see in the pictures, Shortie has become aware of the flash on the camera (she's been aware of the camera for some time now). She can't help but stare at it. I hope she outgrows this, because she looks stunned in all of the pictures! These pictures are from this morning - it looks darker in real life than in the photos. And one without the flash...