A newborn baby with abnormal teeth at birth is a congenital tooth eruption abnormality, also known as a newborn tooth, birth tooth, or fetal tooth. There is usually one or more ectopic incisors at the lower incisors, which are baby’s milk teeth that simply develop too early and grow out at birth. Birth teeth look like ordinary milk teeth, but are usually smaller and may be yellowish in color, because the teeth develop too early and are not fully mineralized, the uncalcified enamel will wear away and also easily scratch the baby’s tongue, sublingual tether and mother’s nipple, and have almost no roots, are loose, and are especially easy to fall out, and if parents cannot detect them in time, they can easily choke into the baby’s trachea, with the serious consequence of choking. Parents are advised to take their baby to the hospital, where the doctor will give symptomatic treatment according to the condition of the teeth.