The first appearance of teeth in babies happens on average around the six-month mark, though don’t be surprised if you see initial signs of a tooth earlier or later than this. It’s not uncommon for your baby to be irritable and uncomfortable during this “teething” period because the gums become inflamed and sensitive, which can also cause congestion and drooling.
Typically, girls begin teething earlier than boys, though for both the most common area for the first teeth to show is in the lower front gum.
Note that primary teeth, of which there are 20, may continue to emerge in your child’s gums until around the age of six years old. These teeth in a sense set the stage for your 32 permanent teeth, which generally appear by age 12 or 13 (with wisdom teeth coming a bit later).