Toothache postcard sketch

Dentistpostcard
After much internal (and external sketchy) struggle... I have a tight sketch for a new promo postcard image. I tried a bunch of ideas, and nothing was jumping out at me as 'right'. I ended up rolling back around to this, my first idea. We'll see how I feel about it in the morning! I really only have about another day to work on this before it's back to working on my book job. I'd like to also paint a little b&w smiling (and clean!) tooth for the back of the card. This will just be a normal size postcard - stamps are just getting outrageous and those oversize postcards need a regular stamp...