Babies are already teething at birth due to premature eruption of milk teeth and horse teeth, as follows: 1, premature eruption of milk teeth: some babies have already erupted early before birth, this time you can continue to observe, if the milk teeth are not obviously loose, you do not need any treatment. If the loosening is very obvious and there is a risk of falling off, it should be extracted in time; 2, horse teeth: horse teeth are not teeth in the real sense, but caused by the proliferation of epithelial tissue, this is caused by physiological phenomena. Most of the horse teeth do not affect the normal feeding, nor the growth and development, and do not need any treatment.