flea

Oh, I forgot, the mutant tooth is not a tooth. Dr. Betty said it was an Epstein's pearl, although this web site (http://www.colgate.com/app/Colgate/US/OC/Information/OralHealthAtAnyAge/InfantsAndChildren/Infants/YourInfantsMouth.cvsp) calls it a Bohn's nodule. Anyway, it's a little mucus thing, that is not infected and will go away by itself. Not a mutant tooth.