My lower lip has always looked much fuller than my upper lip, further pronounced by an underbite. Now an abscess over one of my upper central incisors that comes and goes has flared up again, causing both the gum and the inside of my lip to be swollen -- and my upper lip finally almost matches my lower lip.
Vogon says it looks like I've had a collagen injection. I'll write myself a note to take a photo in the next few days so everyone can see what I look like with evenly-sized lips. It's bizarre.
edit: It went down to normal by dinnertime, so no photo this time.