By your child’s third birthday, all 20 of her baby teeth (also called her primary teeth or milk teeth) should be up and in business. But within a few short years, her permanent teeth will start rearing their little white heads and gradually push out the primary teeth, eventually causing them to fall out one by one. Trusted SourceAmerican Dental Association (ADA)Eruption ChartsSee All Sources [1]| What to Expect
Maybe your baby’s drooling a little (or a lot), or maybe he’s a bit more irritable than usual. While your little one likely doesn’t understand why he has an itchy chin or an achy mouth, you may be able to assume that baby teeth are on their way. | What to Expect