Some babies are born with teeth. Freaky, huh?
Her first tooth is early, but not extremely so. Teething starts for most children any time between 3 months and one year, so there is a huge gap to what is average. And some babies get them earlier, or they don't have a tooth for their first birthday! We photograph a lot of babies at the studio I work at, and we have seen it all. lol
You just need to get a tooth brush and baby toothpaste. Gerber makes a toothbrush that fits on your finger, which is much easier for babies.
And enjoy the smiles with baby's first tooth!